I respect Buffett greatly on a professional level, and think it's the height of arrogance to believe any one of us personally has the moral right to decide which level of lawful activity becomes turpitudinous greed.

THAT SAID...

My uncle (he's 98) had a passing acquaintance with Buffett during their overlap at Penn, and in the one econ class they shared, he remarked having heard Buffett say in almost salivating eagerness as he rubbed his hands that if only there could be another Great Depression, he would make a killing. The dude has value investing in his DNA beyond anything else, I truly believe. But he's argued for changing complex and unfair taxation, and always been a good citizen as far as I can tell. I think if all of Wall Street were like him, the world would be a much better place.

People buying a house also hope for a dip in the market so they can buy in cheaper.

With $150 billion dollars he could have done a lot more than "argue for" changing taxation. If he had spent that money actively fighting for a better system, maybe that'd be worth something. To sit back on your billions and say "aw shucks, this really shouldn't be possible" is not much of an effort.

Edit: Some people seem to be misunderstanding me. I'm saying if he thought taxation was unequal or thought wealth inequality was a problem, he could have used his wealth specifically to fight against billionaires like himself, not just give money towards generic charitable causes.