If you look for the problem where it is non-exsitent the thought will surely make no sense, but instead of a mansion in the suburbs, think of a highly populated area. Think silicon valley for instance, where 150k does not allow for a decent living condition. Take my home country, Brazil: 6.9 million homeless, 6 million empty homes (https://www.bbc.com/portuguese/brasil-44028774). The exact nature of this we can only speculate, but given how crazy expensive flats in big cities like sao paulo cost and how many of those are uninhabited, we can only blame speculation and the market regulation for it.

That is some of the thought behind my argument.