New housing developments should be 100% affordable to working class people. Right now some laws say these new developments need to be X% "affordable" and typically X is less than even 20%. In Boston it's 13%. Furthermore, the definition of "affordable" that these laws use is not affordable to working class people but rather affordable to people making about $125,000 per year. These laws are a mockery of justice!
Rich people can damn well live in the same kind of housing that working class people deserve--good and decent housing that should be made affordable to working class people by hook or by crook. The people building luxury housing today are thieves, and the people that are paying (with undeserved wealth!) to live in luxury housing are thieves too. There should be no rich and no poor. Everybody who contributes reasonably according to ability should be able to take for free what they need or reasonably desire or have equal status with others to receive scarce things equitably rationed according to need. Read more about this at https://www.pdrboston.org/gentrification .