Its an issue that you have to think about long before you have to think about it. I suspect people who are being born today in wealthy western societies will not have a retirement, they will simply wind down their working lives to levels of less activity and stress but they will never stop working.
The UK government like many, pays everybody money simply because they have reached a certain age. This age is creeping upwards but not quickly. One day, in some country somewhere, it will be abolished.