This happens when you basically have a Frequent Shopping Program. The number of QF Points in the system are so high that you get inflation. That there is an increase to both the cash component as well as the points component is very disappointing.
Some of the Classic Reward redemption categories are going up by even more than 20% (just slightly), J SYD-SIN for example.
The saving grace is that you now have to pay more for seats you were never able to find in the first place. And that isn't changing.