I'm not disagreeing with your conclusions. Your previous argument is crap, and that should be obvious.
This:
"In order to equalize income, those of greater-than-average productivity would have to have some of their wealth redistributed, ergo less free."
Is part of an actual argument. "Just look around" is not.
But for what it's worth, I do not agree that freedom intrinsically requires total control of wealth. That it currently does is an artifact of our present culture. I don't even agree that the wealth is "theirs" to begin with.