The middle and working class are the ones who would be paying signficantly more for shoes in this scheme. A minute fraction of them having jobs making shoes instead of the jobs they would have otherwise wouldn't balance things out.
I also take issue with the trend of describing low paying jobs as "slave labor". Absolutely nobody in vietnam is heralding these tariffs, since they don't look forward to working even worse paying jobs as a result. Free trade benefits everyone except for abstruse dilettantes online.
Sure, pay more for shoes, and have a chance at going back to a world where small towns are prosperous and thriving, people can buy homes in their 20s, quality isn't constantly declining, people aren't constantly stressed over losing their jobs because the last quarter's results 'failed to meet expectations', and families can get by with one wage-earner. All this human happiness and thriving destroyed by globalization, so creatures like Phil Knight can get very very rich.
So again, I've no idea whether the tariffs will work, and on paper I'm quite a bit poorer than I was a week ago, but the current regime must be smashed.