Yeah, I dunno, I'm not sure the number is that high? I mean, the people we have at the bottom of the wage pyramid here aren't so much manufacturing type positions, but services (daycare, elderly care), retail, landscaping, agriculture, unskilled construction, or hospitality (according to the last BLS report, it looks like about half of minimum wage employees came from that industry).
I don't think a lot of those are positions that are easily automated now. I mean, if it was possible to use machines to empty trash cans and mop floors in an office building, I feel like firms would be trying that out now, even if it was more expensive, just so they wouldn't have to deal with turnover and absenteeism.
I totally get that a society that decided to make this shift would decide to have less leisure-oriented companies, and that can be a totally okay decision for a society to have. I'm just skeptical that a lot more of these jobs can be done without humans. You can get rid of industrial-assembly line fast food, but just about every step of the food cycle, from fruit-picking to dish washing, employs low wage employees. You might be able to get away with a few less construction workers, but your stores are still going to need/want clerks. We don't have robots to watch our kids yet, etc.
And if we accept that we just must be willing to pay increased prices so our dishwashers can make 40K, etc, wouldn't that lead to enough inflation to render a lot of the benefits of this plan moot?