They have stated that they agree the pension age should rise and be in line with men. The complaint is it was done too suddenly without sufficient notice and therefore didn't give women enough time to effectively plan for it.
Imagine being 59 looking forward to retirement, maybe you've already dropped your hours and have enough savings to make it to 60 and then expecting your pension to kick in when suddenly the rug is pulled out from under you and you need to work 6 more years. I can sympathise with them, even though I'll probably never get a pension.