fancy having a boss like that NO THANKS
so how is he meant to be sure that his business, yes HIS business, is running right and that his staff, yes HIS staff are ok. Personally I wouldn't borrow cars, but the guys were always told that we will spot check at any time. A) to make sure they are ok and B) to check their work.
Prevention is always better than cure
One day when you consider taking on staff you will feel the same, believe me.