Charter cities. https://www.ted.com/talks/paul_romer?language=en https://www.ted.com/talks/paul_romer?language=en Allowing more people to move to a better place

Charter cities. https://www.ted.com/talks/paul_romer?language=en https://www.ted.com/talks/paul_romer?language=en Allowing more people to move to a better place seems very beneficial and might have positive unit economics (sustainable after initial investment).