I grew up in Europe, but am now living in Singapore. It's interesting: despite all the PRC's advances and progress in the last few decades, they are still the poorest Chinese-majority country. You can go even wider, and look at countries with sizeable Chinese minorities, like Malaysia or Thailand, and I think you will find that the average ethnic Chinese person there also makes more than the average ethnic Chinese person does in the PRC.

I haven't checked the numbers for all of the relevant countries, but I think it's fair to say that by and large, PR China has the poorest ethnically Chinese people.