Yikes, might need to send you back to the books to see what happens when a large number of people are displaced all at once.

Look at America/Trump right now with economic immigrants alone. This caused half the country to go "Yea, locking up people in cages and letting losers with guns shoot whoever they want while supporting an authoritarian regime is perfectly ok". Just what do you think it's going to look like when the numbers are 10x that from inside the country alone (a huge amount of the population lives close to the ocean).

Advanced technology has nothing to do with wealth equality and with the costs of making said technology it may be even further reverse correlated in the future.