I’ll add to this that a system designed to stabilize around units of “two-earners” can be expected to find a number of single earners struggling, especially if

I’ll add to this that a system designed to stabilize around units of “two-earners” can be expected to find a number of single earners struggling, especially if you self select your analysis to be discussing single earners from the bottom quintile. It would be a shock if that cohort did not have significant issues existing within the current system. Walmart employees, making minimum wage or close to, are expected to be a cohort from the bottom quintile before accounting for partner income.