One of the toughest problems retirees face is making sure their money lasts as long as they do.
From the U.S. to Europe, Japan and Australia, retirement account balances aren't increasing fast enough to cover rising life expectancy, the World Economic Forum warns in a report published Thursday. The result could be workers outliving their savings by as much as a decade or more.
"The size of the gap is such that it requires action" from policymakers, employers and individuals, said report co-author Han Yik, head of institutional investors at the World Economic Forum. Unless more is done, older people will either need to get by on less or postpone retirement, he said. "You either spend less or you make more."