The purpose of government is to safeguard rights, not regulate economies. It should not attempt to "redistribute wealth" as this is the equivalent of legally sanctioned theft. "The power to tax is the power to destroy." And doesn't the government love destruction! To take from those who earn, to give to those who don't in addition to being morally reprehensible, as a prior post indicated, consolidates the power of government over an individuals finances, which is a far deeper wrong. Perhaps that is the real reason governments engage in this practice of self-aggrandizement, but describe it as a "fairness for all" doctrine.
Certainly no society thrives when a few control everthing, and the many have nothing. Neither does a society thrive when the government "regulates" economies through taxation, and pretends that everryone is economically equivalent and there' a "classless" society. But this is exactly what those who are in government propose. If government did its job in maintaining a level market and allowing economic activity to flourish, the level of economic activity would increase, there would be those few who would become very wealthy, alongside those many who would become quite well to do as well -- "the poor you have with you always," but where individuals are free to dispose of their money as they see fit and are not coerced to give it to government, you'll have the smallest number of those in poverty.
However, government isn't interested in reducing poverty, quite the opposite. By paying lip service to reducing poverty while undermining economic activity, they can then come in with a new "program," defraud the wealthy, "help" to poor, create class warfare, and sit back and enjoy the spoils. The day government wishes to truly lessen poverty will be the day you'll see government remove itself from its role of bleeding its citizens white through taxation.