Mayor Eric Adams is 100% right: If City Council members keep pushing for “free” stuff for migrants, they should at least be willing to share in the costs.

Last week, lawmakers — and nonprofit groups that benefit from their pork — threw hissy fits after Hizzoner told The Post he’d asked the council to “voluntarily” use half its $563 million in “discretionary dollars” to pay for the things they’re demanding.

“I’m hearing from my council persons all the time that we need to give more free stuff away [for migrants]. This stuff costs money!” huffed Adams. Some lawmakers want “free” cellphones, Metrocards, etc. for the newcomers, even as “everyday New Yorkers” don’t get that, he added. “I am not going to take away from taxpayers to go beyond what we have been doing” for migrants.

Yet councilmembers remain in fantasyland. “It’s our responsibility” to provide migrants with “services, resources and the tools to build safe and dignified lives,” Speaker Adrienne Adams insisted. As long as someone else pays for it, she could well add: She refuses, after all, to cut the “lifeline” to the nonprofits her members shower with funds and tells the mayor to look elsewhere, such as to “corporations and big businesses that aren’t paying what they owe