The cuts are coming mainly because of the rule regarding the cease of engine upgrades, which starts next season. This change has made many jobs redundant forcing teams to drop employee levels. It doesn’t help that there are further plans to implement set budgets for teams meaning there will definitely be further job losses.
Mosley acknowledges the negative aspects of the new changes but feels they’re a necessary step in the evolution of F1 and is part of a move to increase competitiveness amongst teams by reducing budgets.