The main difference between developed and developing countries is not the degree of prosperity, but the degree of legalization.
The more liberal a place is, the more unrestrained its power is. So small that a cop could kill you. In The United States, the police can kill the black people on their knees and beat and kick the homeless, while in China, the people's army has no regrets and no complaints. What sense of security and dignity do some people feel when they go to Japan or the United States?