THe idea is to reduce the burden of the state pension. It would be counter productive to do anything counter to that.
However - the left keep wanting to take away higher tax relief on pensions. Which sounds great unless you are a nuclear family where 2 people will rely on one person's pension (like my wife will - we also have other compounding circumstances). If they cut this relief I'll leave the country or go self-employed and play the system, as it will push my marginal tax rate to a stupid rate.
There is a state pension as well, and the retirement age is gradually being increased, but as I understand it that's always for people currently below a certain age - i.e. you won't get to 66 and then suddenly have your retirement age increased to 67.