1. No single entity, and it would be arrogant of me to assume I know how to best direct the whole of society, in the same way it is a conceit of those in power that they must know what's best.
2. Because this has been shown to be the case over a long period of research by a well respected (and generally leftist leaning) professor at Princeton. But also because of the actions the State takes. One need only look at the way the 2008 crisis was handled to see where Government's priorities lie.
3. I would say that the police's priorities lies first with themselves (as with anyone) then with following the orders of their superiors. If you read /r/ProtectAndServe there is a very "just following orders" type of justification of pretty much any action. Along with a sense of defeatism due to this chain of command that they are unable to do anything effective to improve it.
4. Again this assumes that a central entity is even capable of knowing what's best for society. I believe in spontaneous order through voluntary association. Infrastructure that is desired and in the public interest will be built. Maybe not quite as much as you would prefer; but I don't think we can effectively know that.

I don't equate taxation and slavery, I say they are very similar. The best way to describe it is that a 100% tax rate is one aspect of slavery. Would you disagree with that characterization?

I say it is dangerous because it is, it serves to centralize wealth and power like no other mechanism known to man. Once again, you need only look at the handling of the 2008 crisis to see this tendency.

We solved the problem by giving shittons of money to the very people who profited off of causing the crisis to begin with.

I don't have a problem with individual cops I don't blame them for what they do. I was respectful in their subreddit and I didn't go posting everywhere about their sub until they chose to ban me from it.

I am perfectly capable of remaining civil in /r/ProtectAndServe but the officers there are afraid of answering calm, reasonable and critical questions.

These are my own statements in their sub for your evaluation