The original intention of performance pay is to standardize the subsidies of public institutions. In some institutions with good welfare at ordinary times, performance pay has actually declined because the welfare (or gray income) of these units is relatively high. Once the subsidy is standardized, it will definitely not rise but fall. For colleges and universities, I don't know how your welfare is. For some units with poor welfare at ordinary times, performance pay is a salary increase.
However, when it was implemented in some places here, I also heard from my peers that the increase in performance pay was not very large. This is because some of the benefits mentioned just now have been crossed out, and the usual subsidies have been standardized by the performance pay system.