Reactionary taxes like this have a tendency to be ill-considered and have unintended side effects. NY also has a 1% penalty on paying more than $1 million for housing, which was probably enacted to proletariat applause when $1 million was still considered a lot of money. Now it distorts the value of entry level housing in NYC, where you'll have a hard time finding anything more than a studio apartment for $1 million.…
This kind of talking point is reiterated ad nauseam, but never justified or backed by any empirical research.
I'll state one simple thing: if America is unable to raise taxes on second homes over $5M in Manhattan by 1% then this country is well and utterly fucked. The 1% are paying less taxes than anyone else in this country while hoarding the majority of the wealth. Homelessness is skyrocketing, debt levels are through the roof, but god forbid we raise the tax on second homes over $5M by 1%.