Mamdami is focused on himself. He is very typical of his type. A very privileged education, (£50k a year back then- he rejected the chance to go to a more humble £5k a year one), never had a real job of any kind and appears not to have got beyond fifth form slogans with exclamation marks in them. He is also, like his father, deeply resentful and hostile to the country which welcomed him in.
If enacted, his policies would be a serious accelerant to New York's decline. He has committed to over $10bn of spending, probably a lot more, money which the city does not have. This for a budget of around $110bn. He proposes to, you guessed it, "tax the rich!". Well the top 1% in New York already pay about 50% of all income tax there. Businesses too will be targeted, and of course, they will all just stay there and pay more and more tax, rather than locate to Texas or Florida, where they have been moving already. New York also requires a massive bailout every year from federal funds. About £8bn -$10bn last year, depending on how the numbers are looked at. A lot of that money is allocated by executive decree, so a good way of getting more is to abuse and insult the incumbent POTUS.
Mamdami is insulated from all the problems that City impoverishment will bring. He won't have to walk the un-policed streets, or navigate them when the incentivised drug addicts set up camp. None of it will touch him.
But a lot of it is grandstanding, just playing to a client vote. He does not have the power to do any of the things over which he bloviates , being unable to do them without the approval of the State Legislature and the Governor, who though both left wing, are not as disconnected from the world as is Mamdami.
That is without his appalling record on crime. And much else. It is a sad day for a great city. This bloke is a bad piece of work in a cuddly mask.