There most certainly is. You've pointed out some exceptions but do you really think that on the whole they're not correlated? Having more money means people can afford to dress better and are more likely to travel in circles in which dressing well is important.
This may be a bad thing, but it's a reality that people are attuned to - it's a useful heuristic even though it's imperfect. Should you treat people badly because of it? No, but you shouldn't treat them badly even if you were 100% sure they weren't wealthy. That's a separate problem.
This may be a bad thing, but it's a reality that people are attuned to - it's a useful heuristic even though it's imperfect. Should you treat people badly because of it? No, but you shouldn't treat them badly even if you were 100% sure they weren't wealthy. That's a separate problem.