Is there a case of a population getting a lower percentage of white people that has improved that country?

Has a racially multicultural society been successful anywhere?

>>510350765
>how can they pay for transport to leave, when they don't have any money?

Furthermore look at the countries that they leave.

Why would they go back to be poor there when they can be poor in the first world?

The free money gets them to come at the start. It's not what keeps them.