Two people in my family who are independent contractors and lack employer health insurance happen to be turning 65 this year and will finally be eligible for Medicare. Hallelujah! A report by KFF, the health care research and news organization, shows why Medicare eligibility is a milestone: 22 percent of people over 65 are paying off debt incurred for routine medical tests, doctors and dental care. While that’s a lot, it’s half as much as the share of older workers paying off medical debt. Retirees are somewhat protected from piling up debt for two reasons, said Alex Cottrill, a KFF policy analyst. Medicare coverage is nearly universal, and retirees usually have an Advantage Plan, Medigap, Medicaid, or a former employer’s…