Minimum thresholds, and exceptions for less liquid assets (private equity) - ideally, again, coupled with thresholds.
The same way we have exceptions like CA Prop 13 for increasing property taxes.
These problems aren't impossible to solve. It's wild how people will find any tiny excuse to give up on making a change to try and make tax code more fair. If there are edge cases that a blanked change to the code makes worse, that's NOT a reason to just throw our hands up and say "whelp, can't make changes" - it just means we need to add a bit more nuance.
The same way we have exceptions like CA Prop 13 for increasing property taxes.
These problems aren't impossible to solve. It's wild how people will find any tiny excuse to give up on making a change to try and make tax code more fair. If there are edge cases that a blanked change to the code makes worse, that's NOT a reason to just throw our hands up and say "whelp, can't make changes" - it just means we need to add a bit more nuance.