Working after retirement?

"Full retirement is bad for you!" - Yet another survey has concluded.

Could it be that if people were allowed to retire and enjoy themselves, without any state bills to pay off, they would also live longer?
Of course, this has not been looked at in any surveys has it... wouldn't want to put people off from working now would we!

In my world, you reach age 60-65, then as far as the state goes you have done your whack.
No TV license, no council tax, free public transport and free use of local amenities, etc.
Just as in Spain, the retired community are at the centre of family life and everything revolves around them, quite rightly so in my opinion!