The endgame of all this could be that no country anywhere can enforce any environmental or labor laws because corporations will just move somewhere more desperate for jobs.
The thing is that there's an optimal amount of such laws. Not too little, not too much. If businesses couldn't move, there'd be no pressure to junk bad laws. Also, the fact that a business can move from a community is a good thing, as otherwise people forget that regulations and taxes can only be increased to a certain point before killing the golden goose.
Finally, there aren't a finite number of businesses; those who think the EPA's regulations are reasonable should have no problem starting a US business to demonstrate the point.
It's not the laws themselves (with some exceptions) but the paperwork required to comply. For example Singapore has many of the same laws as the US but they really focus on streamlining the bureaucracy so it's not as heavy a burden.
How specifically do they go about this? Bureaucracy is notoriously resistant to streamlining. Does having a more authoritarian government make this easier?
No, they hire the best and brightest to work for the government and hold them accountable. Something western governments refuse to do with government workers usually because of union/civil service work rules.
But what ends up happening then is that Singapore for example actively works to import entrepreneurs because their best and brightest went into government.
Finally, there aren't a finite number of businesses; those who think the EPA's regulations are reasonable should have no problem starting a US business to demonstrate the point.