WASHINGTON (AP) ― An influential group of business CEOs is pushing a plan to gradually increase the full retirement age to 70 for both Social Security and Medicare and to partially privatize the health insurance program for older Americans.

The Business Roundtable’s plan would protect those 55 and older from cuts but younger workers would face significant changes. The plan unveiled Wednesday would result in smaller annual benefit increases for all Social Security recipients. Initial benefits for wealthy retirees would also be smaller.

Medicare recipients would be able to enroll in the traditional program or in private plans that could adjust premiums based on age and health status.

“America can preserve the health and retirement safety net and rein in long-term spending growth by modernizing Medicare and Social Security in a way that addresses America’s new fiscal and demographic realities,” said Gary Loveman, chairman, president and chief executive of casino giant Caesars Entertainment Corp. 

Loveman, who chairs the Business Roundtable’s health and retirement committee, said the business leaders will be meeting with members of Congress and the administration to press them to enact their plan.

The proposal comes as Republican leaders in Congress are calling for spending cuts as part of an agreement to increase the government’s authority to borrow. Treasury Secretary Timothy Geithner says the U.S. will exhaust its borrowing authority as soon as mid-February, raising the possibility of a first-ever national default.

President Barack Obama has said he is willing to negotiate deficit reduction with GOP leaders but insists that those talks be separate from decisions to raise the $16.4 trillion debt ceiling. Obama has warned that if Congress does not raise the debt ceiling, the economy could crash and Social Security checks and veterans’ benefits would be delayed.

The Business Roundtable is an association of CEOs of some of the largest U.S. companies. Member companies account for nearly a third of the total value of the U.S. stock market, according to the group.

The group has been an ally of Obama in the past, endorsing his proposal to raise taxes on high earners during negotiations over the so-called “fiscal cliff” in December. Obama has embraced some parts of the business group’s plan for Social Security and Medicare, but he opposes any plan to privatize Medicare, and has backed away from his earlier support for raising the eligibility age.