Turnover could also be seen as an addressable problem. "People are dying because of poor staff retention and rotation practices" this could be studied and improved upon.
A novel mechanism would be for a patient suing a hospital for malpractice for failing to retain nursing staff which it seems could be proven to be linked to worse outcomes. And when it comes to it, liability lawsuits are an adequate last resort to push back against hospitals cutting corners with staffing levels and staff pay when it comes to nurses.