There's a lot of baloney talked on this subject, and those who say 'why can't we all just get along' and 'we're all individuals' are either deliberately missing the point or haven't been out of their front door for the last twenty years.
For starters, it's the girls' prerogative to see who they want. In my experience, WGs are always pretty keen to see the cash, so if they're going to turn, in significant numbers (and there ARE plenty who say this), against certain ethnic groups, I'd say they have very good reason to do so.
And it's certainly true that haggling is an acceptable way of doing business to a great many people around the world, and is simply not the case in Britain. I spent a few days in Morocco not so long ago, and I found the haggling exhausting. You even have to haggle with fucking cab drivers taking you a couple of miles, because none of the buggers have meters in their cabs.
So I think we have to respect the girls' decisions. If they've had a bad time, through constant haggling or other threats to them or to their livelihood, then they have good reason to behave the way they do.