I've always thought of tithing as a portion of income (annual mint, cumin, lambs, cash, etc.) rather than wealth (the whole herd, the farm, the checking, savings, retirement account).
I don't see how that refutes socialism...though I guess it could be a refutation of communism in some ways. [Not that communism needs refutation: it's been pretty much a self-destructing disaster where ever it has been tried.]
Alprova, although Jesus' views line up with some liberal policies, I don't think todays libs would find some of his other 'social policies' all that appealing. It's hard to imagine unions being happy about the implications of the parable in which the master gave the worker who only worked 2 hours the same pay as those who worked all day.
And if he were a liberal, he'd be a politically incorrect one, blatantly favoring the Jews over other ethnicities---although that, it could be argued, was part of his mission as the Messiah of Jewish prophecy.
Still, he has a lot to say to us today--on both sides of the aisle....or the fence, if you prefer.