They have reduced cabin crew numbers and now have full time FA's working with casual FA's employed by an employment agency, someone who has never lived in the real world thought that would work, "don't worry the plebs will never notice".
They do this to cause pain because they
like to cause pain. In addition they think it will make the expensive CC resign.
Two companies in the USA, West Marine and Circuit City dliberately fired their most experienced sales and service staff and replaced them with cheaper, and far less expereinced people. Both are now only just staving off bankruptcy.