You don't have to, do that but choice between working for capitalist or dying is a choice or an ultimatum? We are all in a society, not a cave with two people, so in one way or the other your deal will affect lives of others, while one has money and power others are trying to survive, that is how free they are. And ofcourse it is not your concern.

If you and a bunch of people want to build a communist society. Go for it.
-well the problem is that there is other society that likes to force people do the opposite

Just don't force others to do what you want. You can voluntarily try whatever you want.
-governments duty is to control and force people otherwise how is it a government

As soon as you need to force others to achieve your goals then you are a force of evil.
-why is that?

I'll die before I become a slave.
Voluntary contracts are not slavery.
Involuntary (aka force) is.
-can you give an example?