Mayor Bill de Blasio just had to exploit the Canyon of Heroes parade for the US Women’s World Cup champs to push his presidential hopes by grandstanding on pay parity. Yet he’s a blatant hypocrite on the issue.

In advance of the parade, de Blasio told reporters that, as president, he’d get Congress to require “equal pay for men and women in all of our national sports teams.” And if he couldn’t, he’d issue a (blatantly illegal) executive order siccing the IRS on the US Soccer Federation to ensure equal pay for the World Cup heroines.

Back on planet Earth, there’s a gender pay gap at the top of his own administration. As Julia Marsh reported in Sunday’s Post, four of the five highest-paid members of his administration are men.

Overall in de Blasio’s top ranks, women earn 81 cents for every dollar earned by the men. And both Schools Chancellor Richard Carranza and new NYCHA chief Gregory Russ have salaries over $400,000, much more than their female predecessors.

Then there’s his supposed move toward “pay equity” for city pre-K teachers. Pay is far less for those who work for community nonprofits than for those employed in pre-K programs at city schools. But de Blasio’s “solution” only rewards some nonprofit workers — those whose jobs are unionized. Two-thirds of these teachers get no justice.

That’s blatant discrimination.

He’s a complete poser.