If you earn more than me, then if you value "time saved" then you should pay me to take my washing off me. Because then you can save even more of your valuable time!
The more of my washing you can take off me, the more of your time you can save by then using a washing machine or laundry service!
Saving an hour of my time is a waste, when saving an hour of your time is worth so much more. So it makes economic sense for you to pay me, to take my washing off me!
