The minimum wage was not intended to be a living wage, where the latter means supporting a family decently. It was intended to be a minimum, hence the name. It was suitable for people just starting out, like mailroom clerks or busboys (the people who clean up restaurant tables). Typically they would still be living with family or sharing living quarters. In college (a long time ago) I got 20% *below* minimum wage at a "work-study" job - part time school job on campus. We were part-time and students, so they felt we didn't deserve a "real" salary.
Around here, it takes $30/hr to afford an average apartment at the recommended 30% of gross income for rent. So that means two people at the $15/hr level, either roommates or a family couple with both working. As a minimum, to me that seems reasonable, but other people may see it differently.
One problem with a national minimum wage is cost of living varies dramatically. When Boeing sent me from Seattle to Alabama, effectively it was a 30% raise due to lower living costs there. So perhaps it should be tied to local cost of living rather than a flat national number.
I disagree; I disagree because when places were first doing 15 an hour min, it was a living wage most places. Also, most people around here working those so called 'entry' level jobs are women my age [53], not teenagers. And also, when I was a working teen [now not all that common], all my money was saved for college, which even in the 80s wasn't cheap.
And seriously, my spouse works a significantly higher than entry level job, and -barely- makes a living wage.
[The us average living wage is 34.90 an hour. I think the lowest is 29 an hour, its been a few weeks since I crunched numbers.]
And the problem isn't whether or not people stuck working crap jobs deserve a wage at or above the poverty line or below, or even if people who're doing highly trained work are barely there, but the fact that we've people making a year's salary of a living wage in the time it takes to sneeze.
Also, I know what a busboy is, even though most of my working career I was stuck in food service, we never had them and wait staff doubled as bussers.
And lastly? Those 'entry' level jobs that make minimum wage? Those are also called essential workers. So, pardon me if I think they deserve a living wage too.
Everyone deserves a living wage.