If the US introduced "proper workers rights and labor laws" today Amazon would probably be fine. In fact they might even be better off long term since it would

If the US introduced "proper workers rights and labor laws" today Amazon would probably be fine. In fact they might even be better off long term since it would greatly increase barriers to entry for any future competition. The interesting (and unanswerable) question is what Amazon would look like today is those hypothetical "proper workers rights and labor laws" had been in place 20 years ago.