Slacks implies pants of certain materials which are not part of a suit (jeans are not slacks, and you would not refer to the pair of trousers that came with a suit as slacks.) It is also more common to use slacks to refer to pants worn by women, while men would wear trousers.
Health care safety net providers are those that have a legal mandate or mission to offer medical care to all patients, regardless of their ability to pay, and have a substantial number of patients who are uninsured or on Medicaid.
In addition to the high number of uninsured people in America, the hospital payment system itself. is broken. Government programs like Medicare and Medicaid pay hospitals less than the cost of. caring for the beneficiaries these programs cover; insurance companies negotiate deep discounts with.