It's really strange that the Government didn't ask every employer at the time the increase in aged was agreed, to include a notice in the next wage packet / slip.
And a reminder at the end of the financial year or something.
I do remember it, but not because of the government or employer but suddenly getting calls from pension companies trying to persuaged me to start a private pension. But had to ask someone why they had started calling. (Couldn't afford the payments anyway).
Another side of this, is that there are now 2 levels of state pension. If you retired when the age was still 60 your pension is actually £40 a week less than those retiring at an older age. I can understand that you can say that's because those retiring later will have made more contributions, but doesn't explain how an older person is mean to survive on less money.