Like you say, trade union/ legislative protection = "one reason", 2 if I were to be pedantic, but I shall refrain
Your suggestion is valid as part of a wider strategy. I intended my post to be a quick comment/ tuppence worth, rather than a complete and exhaustive action plan for radical reform of global economics, business and foreign labour markets.
Come on mate...you genuinely expected to find my solution to sweatshop exploitation in a thread entitled "I'll make you famous (or Adidas will)"?
*Sorry, while typing this I realised that I probably took your post a little more seriously than intended - FTFY
Apologies in advance if that sounds a little patronising.