OP, you have the same concern as a lot of others.
Your suggested approach is one way of trying to address what many of us see as a problem however punters generally dont think with the right head when it comes to punting, so getting punters to act collectively is like asking for a volunteer to go last at a gang bang.
Most punters will say 'just punt cheaper girls' but what happens is those girls become more popular and eventually increase their rates too.
I recall a thread I started almost a year ago (ref:
https://www.ukpunting.com/index.php?topic=154670) where I suggested punters could collectively follow a pricing protocol on this forum which linked the price with the rating, the idea may have been a little bloated but it was to send a message to others that this girl is definitely 'over priced' which would eventually effect the popularity of the girl in question who would then have to correct her pricing.
I dont like paying 150 for a standard punt (150 should be reserved for the fucking exceptional which very few girls are) so from now on any girl who charges 150 but isn't absolutely exceptional will be getting a neutral rating from me, and those with a neutral rating don't get revisited.