Its not like that at all though. When stores have deals they achieve them through two means. The first is loss leaders.
Firstly, I couldn't really give a monkeys either way, let them charge what they want when they want to, if a punter has any sense then they'll use the cheaper of the options.
I would though argue the opposite of your point above, if a girl is on AW and then goes onto an agencies books as well then she hasn't increased her price above the agencies, she's taken a reduction for that work, this could be classed as a loss leader. Take Keeva for example, she only works one day per week for Amour, her pictures, feedback and name however are on Amours site 24/7, her profile is seen by thousands of local punters on a daily basis who may well then go and book her through AW. The commission she pays Amour is simply her advertising costs.
Prostitution however is a service, and a service that has quite literally and practically zero expenditures and 100% profits. It is also a service that costs an obscene amount of money for those guys paying.
100% profit? Premises, advertising, website, condoms, clothing, make up, motor costs for outcalls, toys, 2nd mobile...there's probably a load more I haven't thought of. That aside, yes the money is still pretty fucking mental though.
The only reason they are charging more is they are greedy, and they have total disrespect and disregard for their customers, which really does annoy me in all honesty that they do.
I don't see how it's disrespectful, its economics, is it Disrespectful of Adidas to sell NUFC tops to Fenwicks who'll mark them up at £45 and to Sports Direct who'll sell them for £30 (and lob one of those irritating catalogues in as well)?