Right from the get-go , do you invest in roads, or railroads? Railroads, or airports?
In theory, the Federal Reserve is apolitical, but there is a clear bias toward preventing inflation at all costs. The Federal Reserve
could be tilted to favor full employment or more equitable income distribution.
For another look at apolitical institutions, look at the entities New York State has called "authorities". Ostensibly apolitical, the authorities can do great service to the people of New York, or they can be juggernauts answering to no one.
"The public authority, an autonomous organization that creates public works with money raised by issuing bonds, was legally possible before Mr. Moses became active, but it was a device that had rarely been used. He drafted legislation to set up such authorities as the Jones Beach State Park Authority and the most powerful of them all, the Triborough Bridge and Tunnel Authority. It was through the authorities that Mr. Moses was able to conceive of most of his projects and create them largely unchallenged by public or political pressures. The most successful projects, like his toll bridges, brought in vast revenues that the authority - which meant Mr. Moses himself - could control, free of any public or governmental interference."
http://www.nytimes.com/learning/general/onthisday/bday/1218.html