It was poorly implemented but it's not a scandal. It is clearly emotive, but when someone phones a radio station to complain she's losing her £300 and then it becomes clear it's only £200 she's getting says volumes about the bluster that was around at the time. My parent-in law were affected as they are only just above the threshold. We did a review of what they were getting and it became clear they may be entitled to a different benefit. Long and short, they lost £200 WFA but are now £108 per week better off-and they can't be the only ones.
State pensions, and any income for that matter, is there for people to be able to live. The fact that any increase is then used to pay for day to day living is exactly what an income is for. As far as the state pension is concerned, if bills rise as you indicate, then that will all contribute to inflation and with the triple lock, and will be liable for an increase in the future.
I will reiterate though that the WFA changes were done in a clumsy way and ideally a year's notice should have been given.