The rise in State Pension will result in a high percentage of pensioners becoming liable to tax because the personal allowances are frozen. The tax due cannot be deducted at source so they will be shocked when they receive an assessment sometime after the 6th April asking them to pay the tax they owe on their SP.

Also the rise in SP will mean that pensioners pension credit will reduce, this has a knock on effect to other benefits pensioners can claim.

In other words give with one hand and take back with the other.