As the sweeping Senate bill to overhaul the financial-services industry passed last night in a 59-39 vote, Wall Street is grumbling that the senators charged with keeping New Yorker’s best interests at heart have been asleep at the switch.

Bank execs are fuming that Democrats Chuck Schumer and Kirsten Gillibrand haven’t been more outspoken about some of the thornier elements of the bill that could threaten the underpinnings of the financial industry — and as a result, New York, where most of the big banks are based.

“Their lack of vocal support for the financial industry is like [Iowa] Sen. Chuck Grassley not supporting the corn industry,” said one Wall Street lobbyist.

The overhaul bill includes the creation of an agency to protect consumers, changes to the way that banks are overseen by regulators and imposes strict rules on the creation and trading of derivatives. In addition, the bill has language that could require banks to spin off their derivatives-trading operations into subsidiaries.

Meanwhile, Sheila Bair, chairman of the FDIC, yesterday expressed support for banks’ swaps (derivatives) desks, saying, she hoped Congress will “really think hard” about swaps legislation.

Uncle Sam would be banned from bailing out companies that collapse.

“We’re all dismayed with the New York delegation’s role in the debate,” one banker said. “What’s going on here?”

In the case of Gillibrand, the state’s junior senator, Wall Street officials have said she has spent more time paying lip service to banks than doing actual service.

Sources told The Post that Gillibrand made phone calls to a few top bank execs Tuesday and Wednesday to reiterate her support of the banking industry. However, she wasn’t able to explain to them why she hadn’t been a more vocal advocate during the critical debates over financial reform or led any amendments in the debate.

Gillibrand has told some execs she was reluctant to lead the charge against certain pieces of the FinReg bill — like those that could force big banks to spin off units that help structure complicated derivatives contracts.

Officials point to other senators, such as newly elected Scott Brown (R-Mass), who has been working the phones to protect mutual fund and insurance companies based in his home state.

The New York duo has even been upstaged by John Ensign (R-Nev.) who attacked elements of the reform bill that would have hurt casinos.

Added another: “[Gillibrand has] been running around trying to fundraise [for her own campaign] but hasn’t shown any real support of an industry that’s vital to New York. You are a senator from New York and these are your constituents.”

Gilliband’s office told The Post that she continues to be a proponent of Wall Street. “The senator has always made it crystal clear that creating new common sense rules of the road will protect taxpayers, provide long-term economic stability and ensure New York remains the center of the world’s financial markets,” a spokesman said.

Schumer, who’s been slammed for spending more time politicking behind the scenes and retreating when it really counts, said he feels his role isn’t to defend Wall Street. “The senator’s job is not to defend any one company, but to strengthen and stabilize New York’s economic base so that the taxpayer is not again made to bail out our economy,” Schumer’s office said.

mark.decambre@nypost.com