Not if that country also legislates heavy penalties for companies that produce their goods in countries with worse labor laws.

The economic motive for offshoring would remain (though slightly mitigated), unless that country’s demand (in each regulated sector) was much more than rest of the world’s. I personally doubt that most places are even willing to implement such legislation, given that they’re not even willing to protest PRoC’s use of slave labor and prison camps.

You're just going to Galapagos your economy. Consumers won't put up with high prices and inferior goods. Unless you want to restrict internet/information access so your consumers don't know what they are missing out on.

Almost like we needed some international worker's organization to put pressure on all relevant countries at the same time...