But the work requirements have sparked concern and condemnation from Democrats, patient advocates, clinical groups and health policy researchers, given evidence that work requirements don’t increase employment and cause many eligible individuals to lose coverage due to issues documenting compliance. That assumption is more than six times larger than the largest estimate in any line of research the CMS could have used to estimate work requirements’ impact — including from studies of welfare-to-work programs, studies of the ACA’s Medicaid expansion and research on other work mandates, including experiments in the states, according to the new Brookings report.