Because I get a private pension any state pension increase gets taxed at 20% anyway. Some will be paying 40%. I have no issue with this, as I think income tax should be paid on - er - your income. I just wish it was set up so (say) everyone on £30k, no matter where it comes from pays the same tax. In other words, there should be no way of fiddling it.
As to the state pension in general, I think the issue is we (as a people) have never been willing to pay in enough to make it a decent amount, it is a bare survival sum if that is all you have. The long-term solution (I'll be long gone by then) is for everyone to pay more in their working days to either a state or private pension or both. You really need to start when you are 18, by the way, not 35.
Ideally, the state pension should be some proportion of 40 hours on minimum wage. (You can argue as to the proportion.) It would then go up as the minimum wage went up, and there would be no haggling about 'fairness'.
BTW, for anyone who hasn't cottoned on yet, life isn't fair. It never has been and never will be. You could make me Lord Protector for life with unlimited arbitrary power and I still could not change that. Someone will always be shit on. The best we can do is keep the shitting on to a practical limit.