Too many people, not enough work - Aircraft Mechanic Lockheed Martin Employee Review

(in my department) there are too my employees and not enough work, I'm there for 9 hours a day and only have 3-4 hours worth of work to do because they have to have work for the other 2 shifts. The union is supposed to make sure everyone is paid and treated fairly... that couldn't be farther from the truth. If someone consistent makes mistakes, instead of firing them they just move them to a different job.