We are (supposed to be) a constitutional republic (w/ some democratic elements like popular elections of reps).  This means that mob rule doesn't fly and individual rights are protected from it.  Also, there are limits on what the Federal Government can do.  Hint: Article 1, Section 8 lists 18 powers granted to Congress.  Redistribution schemes aren't on that list.  The preamble to Section 8 is not a blank check, either. If it were, then it would be the only thing included in the Constitution.

Aside from the legal aspects, and assuming that you were correct (you weren't) in your "mob rule" or "might makes right" take on civics, just because you can do something doesn't mean you should.  Again, you don't have the moral authority to reach into my wallet and take my (as in "not yours") $$$ for what you deem to be a good cause.  If you and the rest of the country vote on it, either through referendum or electing legislators to act on your behalf, then it's still stealing (albeit legally).