Because nobody uses public roads, public libraries, municipal water/garbage/electricity services, or public schools. And nobody uses the internet (formerly ARPAnet) or eats food e.g. milk, meat, grains, fruits, vegetables that has all been greatly subsidized with federal funding.
The government can do no good, ever, and everything listed above is just superfluous "waste" spending that either doesn't really exist or is not used by anyone ever.
I find it difficult to believe anyone can trust the government given that it's an ambiguous existence made up of collective robots manufactured who the hell knows where with 0 transparency to the public. It'd make so much more sense if our government was made up of human beings either voted into office or selected by individuals voted into office. It'd also be nice if these "public servants" took part in publishing financial expenditures of the government like with a bill called:
that could be tracked on a website called USAspending.gov
But sadly we don't live in that world. Government is a faceless evil entity that can do no good and does it all with 0 transparency /sigh.