It's an interesting question.

We have a group that promotes a "living wage" construct in Tompkins County that pushes the unquestioned assumption that people who are working in the lowest paying jobs can live 100% alone. It's not something I want to challenge directly, but... It reminds me of discussions about the minimum wage in the late 1980s when it was common for teenagers to work at supermarkets and fast food markets. I think the public never really understood how the

https://en.wikipedia.org/wiki/Earned_income_tax_credit

was specifically intended to help out people who were raising a family with low incomes that was economically efficient and how there is some logic to people who are working in low income jobs qualifying for food stamps, it is not just a way "Wal-Mart is stealing for us."

e.g. part of "affordability" is keeping costs low and as much leftie folks want to sweep it under the rug there is a lot of internal class conflict in groups such as women: like the Sheryl Sandberg type definitely benefits from exploiting less wealthy women to do child care work for them and child care is basically problematic because the child care worker is not productive enough to put their own children in child care without subsidy and you don't get the Fordist scenario where the auto line worker can easily afford to own one of the cars they make.

I can't think of any serious leftist who would advocate for high costs, unless there was some fundamental resource constraint like with fossil fuels.