As I have said before elsewhere, the rest of the world has woken up to this. Companies perform capability audits when managers leave to ensure that perfomance driven bonuses do not arise from "slash and burn" policies.
Better still, companies who reward managers for performance two to five years in ARREARS.
Cabin crew and pilots deserve annual "performance" bonuses because their performance has an almost "instant" effect on profitability. The decisions the Board and senior management makes normally have at least five year time horizons. It stands to reason that their bonuses should be calculated in arrears - often long after they leave.
Its this stupidity - pilots and cabin staff who make decisions having an immediate effect on profits, having a three year time horizon (as in renegotiating an EBA) while management (who make decisions having three to ten year time horizons) get rewarded on "annual" performance.