Earlier quoted context omitted.
He'd be able to 'demand' whatever he wants. Charities "demand" donations all the time and get them, and there's no protectionist law they have to deal with.
English is not my first language, but dictionary tells me that I used the term "demand" correctly: 5. (Law) (a) The asking or seeking for what is due or claimed as due. ... [1913 Webster]
I demand you pay me $20 for the privilege of reading my posts. See, it worked fine. I have the same legitimacy as anyone else that asks for money. You can choose to pay it or not. There's no law that suggests I can charge you, but I can certainly ask and you can choose to pay, if you want.
It's a tricky nuance but it's still a nuance.