1. Reasonably within the means of cities to levy, and 2. Economcially efficient?
This per employee tax was literally a tax on jobs: it taxes a socially beneficial thing. Of course, many taxes are like this, such as the income tax. But adding a totally new tax is mort distorting than simply raising existing income taxes.
And, at a state /federal level, income taxes for some reason are more politically feasible than taxes on externalities, which are economically efficient
If efficiency is out of reach, are there any taxes cities can levy that at least aren’t lousy in terms of efficiency? It seems to me that municipalities generally aren’t given good taxation powers.