Rich people disappear, wealth is redistributed, somehow you guys think that building a house will suddenly take less work hours than it does at the moment? No it won’t, construction workers will be paid more to work just as many hours building that house, they won’t suddenly work 20h/week.
Probably a bad example. The wealthy are the cause of fewer houses being built than are needed to maintain the surplus allowing reasonable pricing in the market. And it is being done primarily to extract more money from people without actually producing anything. So, that house would actually get built and probably to better standards than are currently seen with the efforts to maximize profit.