Sadly so are many of the people who vote for these politicians.
Government is not your friend folks. It is at best, at best, a necessary evil. And many would argue that government isn’t even that necessary. (At least in the way most people think of government.)
There are numerous causes of federal government expansion, including special-interest pressures and the ability to borrow-and-spend endlessly.
Another cause was highlighted in a recent story about a Bush-Obama education program: politicians are excessively optimistic and hopelessly naïve about their ability to solve society’s problems top-down from Washington.