Taxing unrealized gains will be extremely complex, and given that they aren't allowing us to deduct unrealized losses its a pretty shitty setup for the taxpayer.
We need to drastically simplify our tax code rather than further increase its complexity.
A huge question I have here is how unrealized gains on nonfinancial assets would be handles. How would the government determine the fair market value of a multimillion dollar mansion, for example?
More broadly, how would we justify only taxing unrealized gains on individuals? Or would this apply to corporations, banks, and financial institutions as well?
My point isn't actually any specific issue in the proposal, these are just examples of what could be a problem. Our tax code is massive and incomprehensible to almost everyone. Adding further caveats and stipulations just makes it worse. Taking an axe to much of the tax code seems like a much more reasonable approach in my book.
But yes, a tax on "unrealized gains" basically amounts to a property tax, not anything related to an income tax.
The main difference being that a property tax only takes into account the assessed value and ignores what you paid for it. They tax the value, not just unrealized gains.