Using percentage as a informer has always lead to a misleading and irrelevant figure.
A small increase in the cleaner's pay might reflect a significant jump in percentile.
Let's say a cleaner pay is 800pm, and the pay increament is 240, so he will be getting 1040, and according to some MP, he can jolly well afford a HDB flat, and the percent increase is a whopping 30%!
Under the New Performance bonus, 30% is a justification!
The best of all, 30% come from which source? 羊毛出在羊身上.
No need to do any calculations.
Just know that at the end of any calculations the final and biggest figure goes to PAP.