PHOENIX — Bryan Jeffries, the chief of Arizona’s firefighters’ association, has been arguing to anyone who will listen that his members — and the state’s police officers, too — should volunteer to cut their own pension benefits.

Mr. Jeffries, a fourth-generation Arizonan who has been a firefighter and a city councilor, says that emergency workers have a special obligation to protect the public not only from physical peril, but also from financial ruin. Cutting pensions for firefighters and police officers would help save their woefully underfunded retirement plan and bail out towns and cities that are struggling to keep up with their mandated contributions, he says.

“It is critical for our state, for the taxpayers and for the next generation that will be here long after we are gone, that we repair this,” said Mr. Jeffries, whose group, the Professional Fire Fighters of Arizona, is not a union but works on political issues relevant to its membership. “I know intellectually that with these ballooning payments, I feel a direct conflict with the oath I took to protect the citizens.”

His unusual proposal has been a touchy subject for many of the people whose pensions would be cut, because defined benefit pension plans are viewed as compensation for doing dangerous work and a lure to recruit new public servants. And despite the growing shortfall in the statewide pension plan that has put stress on cities and towns, which must make up the difference, politicians have been nevertheless wary of attacking these benefits, for fear of alienating two powerful constituencies and to sidestep questions about why they lavished such generous pensions on them in the first place.