Lol, most people don't "just trust the government".. But the thing is, simply hoping that government will just disappear will not in fact make it disappear.. And simply voting for the Libertarian party will also not make it disappear either.
What we can somewhat influence though is who has the most control/influence over the government. And I would rather have us, the people, having influence over government than just leaving corporations to do whatever they want with it while we pay their bills..