I remember the state legislature investigation of the state government, the legislature was controlled by the GOP in the last few years of Shapp's administration. All that investigation did was try to find things that was going wrong with the administration for political purposes, the GOP denied it but closed down ALL investigations between the time Thornburg won election on a "Clean Government" Platform and the time he was sworn in. The GOP did NOT want to find anything wrong with a GOP Controlled Government.
As to the major scandals, yes Democrats were indicated but the problem could be traced back to when the GOP controlled the Government or do to how the system had been run for years. The best example of this was the Scandals involving the then new Department of Transportation (Which had been created when the old Department of Highways was merged with three other Government departments).
No one complained in the 1960s about the corruption in the Department of Highways for roads were being built on borrowed money, the problem arose when the money came due under Shapp under the then new Department of Transportation (PENNDOT was created in 1970 during the race for Governor, so Shaffer actually signed the bill, but Shapp had to implement the program).
The GOP did NOT want to point out that the problem existed under Shaffer so concentrated on Democrats who had been involved (Yes much like how the GOP looked at Democrats under Bush jr, the GOP policy is simple, claiming the Democrats are corrupt is the easiest way to get elected when the people want the government to do what the GOP opposes).
I do not want to defend the criminals who did commit fraud under Shapp, but the problem could NOT just end with the election of a GOP Governor, yet all such investigation ended with the election of Thornburg. Today, while Obama wants to put the problems caused by Bush jr behind him, you still hear of those problems. Come the first year of Thornburg all such references and investigation ended, like the Government, including former government officials, were 100% clean in 1979 while all of them had been corrupt in 1978, the only difference being that a Democrat was Governor in 1978, but a Republican was Governor in 1979.
Corruption does not end like that, but Investigation of Corruption does if the sole purpose of the Investigation is political advantage as oppose to weeding out corrupt people.
People forget how much the GOP hated Shapp, for he had straighten out the Finances of the State more then any other Governor. Yes, he had appointed some people who took advantage of the changes, but Shapp made no effort to cover up for them and when found out he removed them. Employment by the state peaked with Shapp, do to his efforts to get the Government to run properly. Shapp actually started to reduction in the State Work Force in the last two years of his administration, something Thornburg would "Brag" about when he ran for re-election in 1982.
An an example of this Thornburg claimed to have reduced the Size of the State Government by making it more efficient, but in the days before the net all Thornburg did was make it harder to obtain Government Services. Under Shapp I could do to Downtown Pittsburgh and get a new license plate for my car, that was cut out by Thornburg who re-centralized such services in Harrisburg. When Casey was elected in 1986 you started to see a return to a concern on providing services to the Public via things like the AAA for vehicles services and even plates but that was the product of greater Computer capability that Casey was going to exploit to provide better services to the Public, a concept opposed by the GOP under Thornburg and Ridge (Who succeeded Casey as Governor in 1994). Today we have the net that provides a good bit of the services that Shapp was providing with people in 1978, and that Thornburg cut out to save money.
Yes, things were corrupt, but the Pennsylvania Department of Highways had been corrupt for decades under both Parties (And most of the time under the Control of the GOP) people forget that from the Start of the US Civil War to Shapp, Pennsylvania only have Five Democratic Governors as opposed to 21 Republicans. The old Department of Highways really came into their own with the invention of the Gasoline tax under Governor Earle (The Only Democrat elected Governor between 1894 and 1954), this fueled the expansion of the Pennsylvania Highway system under subsequent GOP administrations till the state Economy started to go bad again and the State Elected Governor Leader as the next Democratic Governor in 1954, 20 years later when the State needed to raise taxes again and the GOP refused again (Leader increased the sales tax to 3% from the 1% his predecessor GOP Governor Fine had passed, the then GOP Controlled State Senate refused to pass an income tax instead and thus both Fine and Leader had to accept a 1 % then 3% sales tax instead).
Governor Leader is noted for one thing, he is the first Pennsylvanian Governor who was elected as a Democrat to be succeeded by the Democrat since Governor Shunk succeeded Governor Porter in 1845. David Lawrence succeeded Leader and raised the Sales tax to 4% again after the GOP refused to consider an Income Tax. GOP Governor Scanton, who succeeded Lawrence in 1962, had to raise the sales tax to 5%, which Governor Shaffer who succeeded Scanton had to increase to 6% in futile attempts to balance the state Budget without an Income tax.
Shapp elected in 1970 managed to finally get an Income Tax passed, something Earle in the 1930s, Leader and Lawrence in the 1950s could NOT get passed do to GOP opposition. One of the reason Shapp was able to do so is he had the first Pennsylvania Controlled State Assembly AND Senate since 1936 (The GOP had controlled both or one or the other, mostly the State Senate since 1936).
The by the time of Ridge the NET had become to strong NOT to adopt a more decentralized system but even this was opposed unless it cut the number of state employees, even if such cut in personnel hurt the ability to provide services to the Public. The concept that Government exist to provides services is something the GOP tends to forget and the Democrats get elected to do AND to take the heat for the taxes needed to pay for those services.
Back to the concept of Corruption, it has been a constant GOP theme in PA every time the Democrats are in control of the Government. Earle and his Democratic Controlled State House and Senate was accused of it in the mid 1930s, Leader and Lawrence were accused of it in the 1950s (Through both had to deal with a GOP controlled State Senate) and the GOP reverted back to the same theme in the mid 1970s once they regained control of the State House. One of the Jokes of the time was that the GOP knew where all the Corruption was, for they had set up the system so that the only way anyone would take such a job was for the bribes, anyone who could do the job could make more money elsewhere, thus the only people taking the job had to take a pay cut and they would sooner or later have to make up that pay cut by taking bribes.
Thus when Thornburg was elected and the GOP again won control of the State House and Senate all investigation of Corruption within the State had to stop less they be forced to look at GOP involvement with corruption. The GOP had hated Earle in the 1930s and Shapp in the 1970s for both were millionaires who had no reason to be corrupt (as had been Leader in the 1950s, Lawrence had NOT been a millionaire but he had independent source of Income so was above accusation of personal Corruption, thus the attacks was against their underlings not them personally for such attacks had no traction given the four Democratic Governor's other sources of Income).
List of PA Governors with some background on each:
http://www.portal.state.pa.us/portal/server.pt/community/governors/4282