They do. They get paid government money that people pay in that community. If you still are puzzled with this then go to wiki.answers.com/Q/How_much_do_animal_cops_make_a_hour ^this would be the same as the real cops. ^
You do not need to pay for it. If the cops suspect drug trafficking in your school they will do it themselves. Someone must raise a complaint with the cops about the suspected drug activity in the school for them to take that action.
if you don't pay the Ebay seller you will not receive the product you are wanting but if you don't still pay him and he has sent the item to your house and you haven't paid him he will report it to eBay's and they will charge you or tell the cops because the have all your details