Rising health premiums are exacerbating income inequality and making coverage too costly for many Americans. The Kaiser Family Foundation found that employer-sponsored health insurance premiums have more than doubled in the last nine years, a rate four times faster than wage A study by McKinsey Global Institute of widening income gaps among . households found that rising employer-health insurance premiums constitute a much larger share of the income of lower-paid employees than higher-paid ones, and consume a bigger share of the household budget for lower income individuals who are lucky enough to have access to a workplace health plan. McKinsey found that in the bottom income group only one in five workers is covered. Moreover,.