How is this different than private power? Honestly, I've had to put up with far more arbitrary bs from my HMO than state or federal programs. With my state and the feds at least there is a clear statement of benefits, a clear procedure to appeal, and a solid attempt to deliver on promises.
How well does that compare to, say, your cable company? Or how well have big companies done respecting your privacy? In other words, lots of people get directly screwed by private companies, too.
I'm not trying to say that government programs are the ideal answer to everything. In the USA there is a serious need for reasonable debate, responsible budgets, and a commitment to good government.
There is plenty of potential for abuse with government over reach. But there is also plenty of abuse from government under-reach, too. Isn't it in everybody's interests to have a functioning government? One that that operates under good-faith intentions to follow it's mandate?