Nothing better shows corporate control over the government than Washington's basic response to the current economic crisis. First, we had "the rescue", then "the recovery". Trillions in public money flowed to the biggest US banks, insurance companies, etc. That "bailed" them out (is it just me or is there a suggestion of criminality in that phrase?), while we waited for benefits to "trickle down" to the rest of us.
As usual, the "trickle-down" part has not happened. Large corporations and their investors kept the government's money for themselves; their profits and stock market "recovered" nicely. We get unemployment, home-foreclosures, job benefit cuts and growing job insecurity. As the crisis hits states and cities, politicians avoid raising corporate taxes in favour of cutting government services and jobs – witness Wisconsin, etc.
Might government bias favouring corporations be deserved, a reward for taxes they pay? No: corporations – especially the larger ones – have avoided taxes as effectively as they have controlled government expenditures to benefit them.
Compare income taxes received by the federal government from individuals and from corporations (their profits are treated as their income), based on statistics from the Office of Management and the Budget in the White House, and the trend is clear. During the Great Depression, federal income tax receipts from individuals and corporations were roughly equal. During the second world war, income tax receipts from corporations were 50% greater than from individuals. The national crises of depression and war produced successful popular demands for corporations to contribute significant portions of federal tax revenues.
http://www.guardian.co.uk/commentisfree/cifamerica/2011/feb/19/us-taxation-taxavoidance