We sometimes see similar localized effects when wealthy foreign governments and NGOs go into poor countries to "help" with foreign aid and investment. When done correctly this can boost the local economy in a sustainable way, kind of priming the pump. But often it just dumps a lot of cash in, causing price inflation as the supply of goods and services fails to keep pace with the supply of money.

Outside influence heavily distorts local economies and needs to be done extremely carefully or you end up making a few people rich and starving everybody else.