The problem I have with that is they all Hold dual citizenship and send $$$'s home. One guy I know from Guatemala, he is gay, he owns two houses in Guatemala and is purchasing a condo here with his gay friend.
He moved in with an 80 year old American woman and is now trying to get her to sign her house over to him.
You can always implement a surcharge on sending money out of the country. Imagine how the Saudis and Chinese would feel.