I quite agree with those answers
You can see an airline sign a contract with a ground handling company because they offer the best price. Yet they can't deliver what they promised because in order to bring the price down they don't have enough workforce, trucks, push ...
so at the end of the contract the airline turn to another which offers a better price or seems to offer a better price
the 1st handling company get rid of some of its employees ....
and so on
the "funny" thing is to see most of the company (handling , airlines, airports...) investing serious amound of money in what they call Quality