Why do McDonald's restaraunts have such low cleanliness standards?

Whenever I have been in a McDonald's it seems filthy. They never wear gloves or hairnets while preparing the food. There was a hepatitis break out at one McDonald's in my city and another Hepatitis break out in a McDonald's in a city 2 hours away from here. This is due to people not washing their hands properly and no gloves. The floor just seems messy and sometimes the tables look unclean. One time I was in there someone vomited on the floor and it took them 15 mins for someone to go clean it up. This is why I never eat there anymore. It seems like McDonald's only cares about money and less about health and cleanliness standards.