My ideal tax system taxes people based on land ownership (not property ownership - you can only be taxed for the land your house sits on, not the house itself, for complex reasons which basically come down to "the land was there before people, the house wasn't"), and distributes all post-spending taxes evenly across the population (and there's your welfare system). So I more or less agree with you that (certain kinds of) property (are)/is problematic.

I'm less certain what you mean by "determining what I think is 0" - I understand the concept you're conveying, I am clueless as to why you're conveying it, which means I'm missing something you're trying to communicate.