First of all, these public sector jobs are virtually unaffected by free market principles. It's all political. Secondly, many of these government workers are guaranteed hefty pensions when they retire, regardless of the state of the economy in the real world.
If you want to see where a lot of your tax dollars are going, take a look at this article in Forbes. Though the article barely scratches the surface, the comments section has already received quite a few gripes from those who live off the money taken by force from ordinary citizens. Some even play the "we're risking our lives, therefore we're above criticism" card. Such is the entitlement mindset of most government employees.