Any time they've tried to remove licences from the criminals who work Dublin airport drivers' unions such as TTNH have challenged them in court, DM. IDTF even successfully challenged a Garda Superintendent's decision not to grant a new (first time) licence to a convicted drug dealer.
It's a bit like the 9 year rule... when we (drivers' unions) wanted it we thought it would get rid of all the blacks, we didn't want it for those of us who are white and Irish by accident of birth.