How much do Wimbledon lines people get paid?

It depends on what devision you are referring to. For the USTA (United States Tennis Association) the salary is extremely low and some are even volenteer positions. Many other devisions like this are the same. If you are a referee for professional tournaments on the ATP, then you can actually make a decent amount of money, unfortunately you would have to travel a lot because you would need to be at all the tournaments all around the world.