Well good news, the government already takes a portion of everyone's wealth, especially Brin, via capital gains, income, property and other taxes. The Great Society happened just fine without a wealth tax and the government collects far more in taxes today than it did in the 1960s.

You're also pinballing between "the government needs more money to give to poor people" and "we should just take rich people's money because it makes poor people feel bad that some people are rich and it will make them feel better if the rich aren't so rich". Does the government actually need the money or not?

People might be temporarily helped by handouts, but they won't rise out of poverty until there's work available for them to support themselves. That is hampered by discouraging investment in productive enterprise via excessive taxes.