I'm not sure how there is a societal problem with "run-away levels of wealth".
We have societal problems around food costs, housing costs, healthcare costs, &c; but people with extreme wealth are not bidding up sandwiches, studio apartments, &c, &c. If we "solve" their wealth by taking it from them and giving it to the government, what does that help? What good is the government going to do with that? Allocating money through the government has not been a particularly successful strategy for improving the overall standard of living.
We have societal problems around food costs, housing costs, healthcare costs, &c; but people with extreme wealth are not bidding up sandwiches, studio apartments, &c, &c. If we "solve" their wealth by taking it from them and giving it to the government, what does that help? What good is the government going to do with that? Allocating money through the government has not been a particularly successful strategy for improving the overall standard of living.