So what?Would be nice, but the major problem is countries like Saudi would just swoop in and take everyone, teams are able to pay massive wages in europe so most players aren't swayed by the Saudi/Chinese league etc, take that away and most people would just go there.
Let them go. If they're happy playing to average crowds of 3 or 4k each week (unless it's a 'derby' and they might get 15/20) it's up to them.
It would still be a relatively even playing field here. Thats all that matters.
Edit: The day you worry more about what other leagues will do is the day you've lost faith in your own.