Former Mayor Ed Koch admitted this morning that his new reform PAC, “New York Uprising,” doesn’t have any real way of forcing the incumbents and insurgents to remain true to their pledges (should they give them) to support an independent redistricting commission if they’re (re)elected in the fall.

Except, of course, shame.

“You’re not a person of your word; you’re a liar,” Koch said of anyone who breaks his/her pledge. “I don’t think people in office today want to have that confrontation. These are honorable people…I expect them to keep their commitments, and I have no doubt they will on this issue.”

Koch, who was joined at today’s event by Citizens Union Executive Director Dick Dadey and former city Parks Commissioner Henry Stern, who heads the good government group New York Civic, said he received signed pledges from all three GOP gubernatorial candidates and a letter from presumptive Democratic nominee, AG Andrew Cuomo, agreeing to veto any redistricting plan that is conducted in the traditional, politically-driven manner.

(Koch said he was satisfied with Cuomo’s letter, even though it wasn’t a formal pledge).

New York Uprising will be asking all 212 legislative candidates – incumbents and challengers – to sign a pledge in support of the measure, which is being carried at the moment by Assemblyman Mike Gianaris.

“They’re not all bums, but every incumbent is running scared,” Koch said. “They’ve got polls that show that they could lose. That might stiffen their spine and permit them to decide: ‘Well, we’re going to go good government this year.'”

Koch said he seeded New York Uprising with $10,000 of his own money. He said others have kicked in as much as $25,000, but didn’t reveal specifically who had given what. The aim, he said, is to raise $250,000, but the PAC does not plan – at this moment, anyway – to actively support or target candidates, but rather to “educate” the public about its efforts.

As has been reported, former Mayor Rudy Giuliani and former Gov. Mario Cuomo are among the nine trustees of New York Uprising. (Neither was on hand at Koch’s firm, Bryan Cave, this morning). The trustees are bipartisan lot of prominent New Yorkers, including former state Comptroller Ned Regan, former Bronx BP Herman Badillo, former Deputy Mayor Rudy Washington, and Crain’s columnist Alair Townsend.

Also present this morning was Mayor Bloomberg’s 2009 campaign manager Brad Tusk, who informs me he’s working on the New York Uprising effort pro bono.

Bloomberg, a Democrat-turned-Republican-turned-independent who is infamously not a fan of Albany, was not at the event, although Koch admitted an invitation had been extended to the mayor to attend the PAC’s initial meeting and he had declined.

Koch said he understood the mayor’s predicament, noting: “I was once the mayor of New York City; you have to deal with these people every day.” He noted the city is already poised to take a big hit in the state budget and surmised the amount would have been doubled had Bloomberg signed on as a trustee.