It's not because this person is lazy and wants to work less hours :brolleyes:
This person would be guaranteeing privacy and full dedication.
If I follow your reasoning, if I hire an exclusive chef who owns a restaurant, just for preparing dinner for me and my wife, it should be really cheap. I'm saving him lots of work if he'd stay at the restaurant serving 20 customers. He's "working less hours".
He'd only cook for me and my wife if he can make as much money during the same time. And I'd pay the additional rate for the exclusive service.
Try to vision this as a business owner, not as an employee.