With the Federal minimum wage currently at $7.25/hr, that’s just $15k/year at full-time. That puts many minimum wage workers below many countries’ average wages [1]. But that’s before adjusting for purchasing power parity.
Being a single earner on minimum wage effectively guarantees you and your family will be in poverty in the US. That is effectively not true in most countries in Europe, even the poor ones. You don’t get to live well or anything, but you certainly aren’t planning on poverty.
[1] California, and San Francisco in particular, have a higher minimum wage but also higher expenses. Worse, many low-education workers are waitresses, which often have a “tipped minimum wage” as low as $2.15/hr before tips (again, San Francisco doesn’t do this, but it’s expensive to live here).
Regardless of the correct level before causing a crowding out of employment, what do you believe the purpose of having a minimum wage is (if not to prevent poverty)? Why not just let the market decide?
Edit: I mean this seriously, and don’t intend it as an attack. I’m (personally) unclear on the perceived purpose of the minimum wage.
Edit 2: like many folks, my “we’ve never come close to it” is influenced by http://www.nber.org/papers/w4509 and similar studies, and I’m aware of the opinions that the study was flawed or doesn’t generalize (e.g., https://www.google.com/amp/s/www.forbes.com/sites/timworstal...).