The island nation of Tuvalu, which is currently having to make plans because of rising sea levels has a per capita gdp of 5,221.53 USD. Manhatten has a per captia gdp of 474,462.94 USD. This is by 2022 numbers, but I doubt they changed much.
As shitty as moving it, it’s much easier for Manhattanites to migrate to higher ground then it is for the people of Tuvalu. Both in terms of logistics and available resources. I am so, so sick of hearing from “bleeding heart liberals” who only seem to roleplay progressivism, but can never muster any action because the popcorn and circus is too good.