So many people support the system because the system usually works very well.
Just think, for example, of what a boon public roads are to commerce. By making investments in public infrastructure, the government can improve opportunities for both individuals and businesses. Not all such investments pay off, of course. Just like investments of all kinds, there is risk.
Moreover, it’s clearly the rational choice for most people to support such a system.
(After all, if it wasn’t, why would they support it? And if they are simply not being rational, then why would they be rational under any other system? And if they wouldn’t be rational under your proposed system, then they wouldn’t do very well under it at all. So, no matter how we look at it, the current system is the rational choice for most people, regardless of whether they choose it rationally.)
Simply put, people make mistakes. No matter how strong you are, how smart you are, or how carefully you plan, you will sometimes make wrong decisions. This is, to me, quite obvious. If you disagree that wrong decisions in life are inevitable, then please let us know now and avoid much confusion in this thread.
People, in general, are aware that they have blind spots. They know they are imperfect. A system supported by their money that watches their blind spots for them is in their best interests. (The fact that such a system is imperfect is inevitable. Nothing is perfect.)
So, in short, people support the system because it’s the rational choice for them to make given their veil of ignorance over the future and the knowledge that “there but for the grace of god go I”.
On another note, the OP makes several unsupported assertions. Most glaring are the following:
The government mishandles money, and every program that exists/has ever existed. Privatization is always better.
(You seem to offer this more as an axiom than as a point for debate. Can you prove it, or offer any reason to believe it?)
People like me, and there are many, would be much more willing to give, if it wasn’t being forcefully taken.
(I see no reason to believe that there are significant numbers of people who disagree with the system like you do. If so, why are they still here? Also, I have only your word to go on that you’d give more if you were taxed less. Maybe you would. Maybe you wouldn’t. I don’t know. And you don’t know what others would do, either.)
**Programs that they have created, unconstitutionally, to “benefit society.”
** (What programs have been created that are unconstitutional? What are you talking about here?)
And this is misleading, if not outright wrong:
**
The government takes our money for programs that we have not consented to.**
You choose to live here, yes? You vote, yes? (Or at least, you have the right to vote.) You use public infrastructure? Have you written many congressmen or other leaders about this? In short, I suspect you have implicitly consented by using the fruits of the system and not taking direct steps that would attempt to change the system or at least remove yourself from the unbearable yoke of it.