Pop swap definition: sending a native born of place A to place B and sending a native of place B to place A.
My idea is to implement a 4 million person pop swap between the US and Puerto Rico. This means that 2 million consenting Puerto Ricans move to the US and 2 million consenting Americans move to Puerto Rico. The purpose of this is to assiliminate the Puerto Ricans who move to the US by exposing them to anglophones and to make Puerto Rico into a more American, anglophone place by sending 2 million English speakers there which can set up PR becoming a state in the near future.
People would consent to the idea by them being offered enough money to move from PR to the US or vice versa. Puerto Ricans would want the better opportunity in the US, Americans would want the tropical climate in PR. Statehood for the island and privatization of government companies would reduce costs for the people in PR whether they be Anglophone of Hispanophone.
This I think can benefit everyone involved.