My question is were these employees uncovered for medical care and were they aware of their status? If they were led to believe they had coverage but did not, that is an unbelievable dereliction of duty owed these people. 
Were the insurance  companies still paying the clients bills though the employer was derelict in paying for the arranged coverage? From '09 to '16 seems a bit too long to have not rectified this serious matter.
Regarding responsibility to workers the motto here is ...do what we say is just, but don't expect us to do so.
Leo XIII must be spinning in his grave.