All it really takes is an employer with a great business model and a desire to ensure his employees stick around. There are only 4 employees in our company including the boss. The dispatch guy and myself are full time and the boss and accounts girl are part time. Having got the right people, my boss can stick his head in every now and then but spends the majority of his time on his family and working on his house. He also has at least 2 extended overseas holidays a year leaving the other 3 of us to run things while he is away for a couple of months at a time. The 3 of us are reliable and good at our jobs and there are never fires to be put out after he has been away.
Ask yourself, if you had a high profit business that turned over a few million a year with a skeleton staff you could rely on, wouldn't you do your best to ensure those staff were happy and wanted to stick around?