Ok I'm going to perhaps share TOO much here...
It costs me £100 per day in purely work-related expenses to be a prostitute. (shock horror)
£40 per day for separate Incall flat premises + bills for flat (I cannot work from home for various reasons)
£50 per day for security since where I am if 2 girls working together then the lease-holder gets prosecuted (stupid bloody laws)
MINIMUM OF £10 kept away per day for expenses such as oils, lubricants, latex-free condoms, refreshments for clients, periodic new outfits and toys,work phone top up, mobile broadband.
This is before I have to pay tax and NI when they too send me a bill!
I'm going to ignore the troll (has to be a troll, seriously).
Also, it's not so simple to just claim benefits and work on the side. Sure, many get away with it but all it takes is a jealous neighbour, or the benefits people looking into your lifestyle for them to come crashing down like a ton of bricks and you will have a criminal record for fraud. You cannot bank your money, invest it, or even purchase holidays/cars etc without it being suspicious. I know a couple of people personally this has happened to. If you don't want to take the that risk, you surrender to the tax man I guess.
Agreed, it is still a pretty good living even after all that is deducted, but like Gary (I think it was) said, it is only a very few women who will be willing to offer sexual services, and even fewer who will be willing to offer them for any significant period of time, and even fewer still who will not get too jaded by the James's of the world! . It cannot be compared to other jobs, it just can't.