Lots of older workers are staying in the workforce past what should have been their retirement day, and their numbers are expected to grow—confronting both them and their employers with the dilemma of how to proceed in, and with, an older workforce.

A Washington Post report says that the issue of an aging workforce is not just presenting a depressing reality to those who long to retire, it’s also challenging employers with the need to cope with older workers who just won’t—or can’t—go away.

Bloomberg reports that the percentage of U.S. workers lingering past the traditional retirement age hit new highs in the most recent jobs numbers; in fact, 19 percent of those 65 and older are working at least part time.