Neverinbalance, in reply to your question, I believe that KLM (ERA) had such an arrangement when they were still in business. It was run as more of a tax reducer than anything else as I believe you paid less tax on the amount paid within the scheme???!!! It ran something like this:
A sister company was set up which dealt with employees salaries and it was this company, not the main company, to which the profit related pay was attributed. Therefore, as the company was more or less guaranteed to hit its targets of pay, the employees were assured of getting the maximum profit related pay with the minimum tax burden.