Been doing it perfectly adequately for rates/Council Tax for donkey's years. Properties are valued quite routinely everyday - and you seem to think valuing properties is a new and impossible concept?
OK...........
"graduated, of course, so it wouldn't hugely impact the folks paying off a mortgage on their three bedroomed semi"
So which part of that did you fail to comprehend? And who said anything about 10%?
Bonkers. :facepalm:
Lots of possibilities. Raising income tax - yes, fair enough, we all want better NHS and public services; they cost money. Stop the NHS out-sourcing everything under the sun - it just puts money in the company owners' pockets. Do it in-house.
My particular idea would be a property tax, based on...