Mayor de Blasio is begging President Trump and Congress for a $7.4 billion bailout to close looming budget gaps. Given the size of the coronavirus cataclysm, given how earlier stimulus bills disproportionately shortchanged the city and state, given how vital New York is to the national economy, we wouldn’t turn down even an unpretty penny from Washington.

But de Blasio would have been in a far better position asking for help if he’d demanded more shared sacrifice in his just-unveiled executive budget revision.

We’re staring into a fiscal black hole. An estimated 500,000 to 1.2 million New Yorkers will likely lose their jobs. Income, corporate and sales tax revenues have all imploded.

The mayor, who’s never before met a budget he didn’t increase, now proposes $2 billion in cuts. New hiring is delayed. Public pools won’t open for the summer. A popular summer youth jobs program got the axe. He’s tapping $4 billion in emergency reserve money. All necessary.

But personnel is where the spending is. The city will have 306,457 full-time employees come July 1. Total headcount has grown by more than 30,000 since de Blasio took over in 2014.

Municipal unions are scheduled to pocket an estimated $753 million in pay raises this year, when layoffs, furloughs and paycuts are the norm in the private sector. De Blasio should be begging his friends in labor to delay those hikes. Now.

If he showed off his fish-catching skills, we’d be better positioned to get FedExed an enormous box of emergency provisions on ice.