Trying to Find a Mover...

Over the past week, I've been trying to find a moving company to move me around the block. I plan on taking all of the small stuff myself, but need professionals to move the furniture and appliances. I've received several estimates and have decided on one guy that has his own moving company as a side career/job. My question is...aside from the dude doing my job, what gives movers the privilege to charge what an attorney or physician can charge? Feel free to comment.