I agree with you that there are people concealing work in the US and they are doing something illegal, stupid and greedy (I would add the word fraudulent). So concealing work outside the US is also illegal, stupid, greedy and fraudulent.

Won't help you do something illegal, stupid, greedy or fraudulent.

And Jim 0918, if people are rightfully disabled and can't collect, then they are also not able to work even if they leave the US. If they can work outside the US, they can work inside the US. So those people cannot be considered rightfully disabled. They may have the opinion that they are disabled, but the law must not agree with them.