Unfortunately, it is impossible to isolate a community in modern society. One way or another the funds will leak, for example, IS funded income being used by K

Unfortunately, it is impossible to isolate a community in modern society. One way or another the funds will leak, for example, IS funded income being used by Kenyans to buy Chinese TVs. That money will take a long way to come back to Kenya or US, but there may be a positive net effect even if it doesn't.