An interesting missive just arrived from once-and- — he hopes — future Pub lic Advocate Mark Green:

Green, running again for the office he held from 1994 to 2001, is grubbing for the private campaign cash he needs to boost him over the qualifying threshold for taxpayer-supplied matching funds.

“A New York City law that I wrote 11 years ago,” Green says, “provides that any donation up to $175 from a city resident is matched 6:1 by the city.”

Let’s get this straight: Green actually is boasting about having written a law that will help him pick the taxpayers’ pockets to fund a run for an office where his sole job would be to waste even more public money.

Cool deal for him.

Especially since the essential point of the advocate’s office is to set up the incumbent to run for mayor — as Green did in 2001 — with the taxpayer picking up most of that tab.

New York pols sure do treat themselves well, don’t they?