Mayor Zohran Mamdani addresses thousands of union members gathered in Washington Square Park in Manhattan on Friday, May 1, 2026. Luiz C. Ribeiro for NY Post A new watchdog report points to a peril Mayor Zohran Mamdani refuses to see: New York City can’t actually afford to bleed its golden geese even more just to fund his spending dreams. Competitive NYC from the Citizens Budget Committee points out that people who moved out of the city from 2019 to 2023 earned $68 billion more than those who moved in — and the exodus is growing: Last year, it spread across all income levels . Sure, the mayor ran on making Gotham more affordable for most people — but he’s done next to nothing to actually deliver: “Universal” free day care is far off for most; even his rent freeze wouldn’t reduce anyone’s costs. The CBC report urges Mamdani to make New York City “more magnetic” — more attractive or more valuable to businesses, innovators, job-creators, residents and families.…