President Barack Obama on Tuesday challenged Congress to pay for new increases in federal benefit programs as it goes rather than sink the nation deeper into a debt, calling it a matter of public responsibility.

Republicans lashed back that Obama is no voice of fiscal restraint as the deficit soars.

The president's plan would require Congress to pay for new entitlement spending, such as health care, by raising taxes or coming up with budget cuts — a "pay-as-you-go" system that would have the force of law. Under the proposal, if new spending or tax reductions are not offset, there would be automatic cuts in so-called mandatory programs — although Social Security payments and some other programs would be exempt.

Not noted by the president: Tuesday's plan is a watered-down version of the so-called "PAYGO" rules proposed just last month in his own budget plan.

That version would have required, on average, all affected legislation to be paid for in the very first year. The new plan only requires such legislation to be financed over the coming decade. That mirrors congressional rules and reflects the likelihood that health care reform will add to the deficit in the early years.

Obama said the principle is simple: Congress can only spend a dollar if it saves a dollar somewhere else.

"It is no coincidence that this rule was in place when we moved from record deficits to record surpluses in the 1990s — and that when this rule was abandoned, we returned to record deficits that doubled the national debt," Obama said, flanked at the White House by supportive Democratic lawmakers.

"Entitlement increases and tax cuts need to be paid for," he said. "They're not free, and borrowing to finance them is not a sustainable long-term policy."