The people they hire are cheap labor from third world countries. That's why cruising has been so affordable for most folk. I'm surprised it hasn't happened more.
And, I'm sure that most of the illness people are experiencing, and that seems to be of common occurence now, is from poor hygene related to the same personel. I'm surprised that there hasn't been an out break of disease that has been eradicated in the US on one of these cruise ships. It's just a matter of time.

I'm not picking on the personel. It's not their fault they were born in an impoverished country. Cruise ships are a way out of poverty and an oportunity. But, unfortunatley this is what you get.