In a country where most people make very little how can inflation keep running prices up so quickly? Shouldn't there be an upper limit to it where the regular people simply can't or won't pay which should keep prices under control?
Pretty anti-social, myself, but I think it has less to do about race and more to do about the assumption some people make with regard to other people in a foreign land, and the presumed common bond of sorts. The more exotic, first-world vs. third-world conditions, the more apparent, I think. The skin color only serves as the big sign on their back. Regardless of skin color, or hasty assumptions, returning a kind gesture may go further than we're willing to give thought about it.
The OP describes wandering through a shopping mall and singling people out on the basis of their apparent race. This is just weird, and indicates some kind of social malfunction. An elderly Australian recently struck up a conversation with me while queueing in a branch of BangkokBank. I think he saw me with my wife and kids and realising I'm in it for the long haul like himself, seized the opportunity to say hello and potentially make a friend. He was with who I assumed to be his very elegant looking wife. That's different, the setting and circumstances were OK for that. A decent class of Farang is a rarefied thing in these parts, they tend to gravitate when opportunity arises. Birds of a feather, as the saying goes. The OP was likely a troll, but it's an interesting conversation anyway. . .