I've always thought that there should be a property damage liability limit on public roads. If you want to drive a $250k lambo why do I have to buy extra insura

I've always thought that there should be a property damage liability limit on public roads. If you want to drive a $250k lambo why do I have to buy extra insurance because you brought an expensive toy out to play on vital public infrastructure? Pass the extra liability beyond, say, $100k to the owner of the toy car. If some shitty driver plows into my crappy old car, they are out maybe $3k in property damage. If they happen to hit a supercar, then somehow the same action nets them a liability that could buy them a starter home? Mind you, I live in BC, where there is only one liability insurance company, and they have a government mandate to insure everyone with a license, no matter how bad their driving record is. Which means that every idiot's risk gets spread onto my bill.