WASHINGTON – Prospects are bleak for fixing Social Security’s financial problems as the government retirement insurance program celebrates its 75th anniversary this week.

Many Democrats adamantly oppose any cut in benefits to reduce cost and some won’t accept a gradual increase in the retirement age, something that was done in the last overhaul in 1983. Republicans say an increase in Social Security taxes is out of the question, even for the wealthy.

Unless Congress acts, Social Security’s combined retirement and disability trust funds are expected to run out of money in 2037. At that point, Social Security will collect enough in payroll taxes to cover about three-fourths of the benefits.

The rhetoric is creating a tough environment for President Barack Obama’s bipartisan fiscal commission to come up with recommendations to improve the government’s troubled finances. Obama says everything should be on the table, and the commission’s co-chairmen — a Republican and a Democrat — have asked for civil discourse. Not likely.

Social Security has been, is and will continue to be potentially deadly for the career of any politician who dares touch it.

While Obama’s commission was holding its latest meeting, dozens of House Democrats gathered on the steps of the Capitol to accuse Republicans of trying to wreck Social Security by creating private accounts, an idea with little support in Congress since former President George W. Bush unsuccessfully tried it.

“Probably the months before an election are not the time to try to negotiate Social Security,” said John Rother, executive vice president of AARP.

The commission’s proposals are due in December, after November elections.

Despite the rhetoric, many experts think policymakers will eventually settle on a compromise: small cuts in future benefits coupled with small tax increases.

“You could put 10 moderates in a room and they could come up with a package in a day that solved the long-term problem and combined tax increases and spending cuts,” said William Gale, an adviser to President George H. W. Bush’s Council of Economic Advisers and now co-director of the Tax Policy Center. “It’s not that hard to do.”

Social Security’s short-term finances are being hurt by a recession that shed more than 8 million jobs, reducing revenue from the payroll taxes that support the program. Social Security’s long-term finances will be strained as the 78 million baby boomers reach retirement age — and live longer as life expectancy increases.

For the first time since the 1980s, Social Security is paying out more money in benefits than it collects in payroll taxes. The program is projected to post surpluses again in 2012 through 2014 but will return to permanent deficits in 2015, its trustees said in their annual report last week.