It took a few days, but JPMorgan Chase CEO Jamie Dimon finally offered some hard words on Mayor Zohran Mamdani’s scapegoating of successful New Yorkers. 

“You can talk about morality and ideology all you want, but if things don’t get better, you didn’t do a good job,” Dimon bluntly warned the mayor in a Bloomberg TV interview Thursday.

In an echo of his earlier, too-polite in-person comments to Mamdani, he added: “Hopefully he’ll learn,” because “I want him to do a good job.”

Unlike City Hall’s boy Bolshevik, the 70-year-old Wall Street titan knows what it takes to make the Big Apple prosperous.

Mamdani can “be an ideologue, but he has to compete too” by making “the city a place where people want to grow and build and live and have families and work,” chided Dimon. 

“And people vote with their feet,” he warned.

The city — and the mayor — need to hear a lot more of this.

If City Hall continues to obsess with redistribution and cheap class-warfare posturing, the city won’t “survive and grow”: It will falter and shrink.

Maybe, just maybe, getting called out repeatedly by the big guns who make Gotham work will at least teach Mamdani least a little humility.