Attention, voters: The mayor of New York is now clearly corrupt. Do you care?

Federal court testimony in the trial of former corrections union boss Norman Seabrook establishes that Bill de Blasio was bought and paid for. Admitted felon Jona Rechnitz, who raised $100,000 for de Blasio and chipped in chump change every time he was asked, described the mayor as a donors’ puppet.

Pull his strings and get the government action you want.

As Rechnitz put it under a prosecutor’s questioning: “Whenever we would call him for access or for a ­favor, we were getting the response that we expected and the results we were ­expecting.”

This is a defining moment in de Blasio’s tenure. It is infuriating evidence of rot at the top, of the fish stinking from the head.

Yet the awful smell is not the worst thing. That distinction goes to the fact that de Blasio himself is not on trial.

He should be. If he were, a parade of donors around the block could echo Rechnitz’s sleazy tale of a politician for sale.

Real estate developers, unions, vendors — they gave big and they got big. And the mayor got off ­scot-free.

For reasons that amount to loopholes in corruption cases, federal and state prosecutors closed their probes of the mayor’s pay-to-play scheme without bringing charges. They cited the lack of clarity following a US Supreme Court ruling on what constitutes official corruption and the fact that they didn’t find evidence that the mayor put bribe money in his pocket.

But that’s not the same as saying he didn’t take bribes; it’s just that the millions of dollars he took from individuals, firms and unions that needed his approval went to his political consultants and ad gurus whose job was to further the mayor’s career.

If that’s not corrupt, nothing is. And if nothing is corrupt, we should throw away all those ethics rules, bribery laws and endless investigations. They’re nothing but a waste of taxpayers’ hope and money.

In backing off, prosecutors greenlighted the second coming of Tammany Hall’s “legal graft.” The mayor, like Tammany pol George Washington Plun­kitt more than a century ago, saw his “opportunities and took ’em.”

I have written that the only two mayors in modern times defeated after a single term — Abe Beame and David Dinkins — lost because the city faced a severe crisis. Beame had the fiscal crisis, and Dinkins the crime and quality-of-life crisis.

None of those situations applies now, yet it is clear that New York faces another kind of crisis that is just as severe on its own terms. It is a crisis of public trust.

The mayor lacks even minimal integrity, so everything he does is suspect. And that won’t change if he gets four more years. Indeed, facing term limits and Swiss-cheese corruption laws, he won’t need to pretend to be honest.

If that’s good enough for New York, shame on us.