And they probably will pay (income) tax all their lives (as opposed to just their working lives). A generation ago I think this was unusual. With the mortgage paid off and State Pension meeting the household bills any private pension can be spent on things like holidays.
Besides the obvious, there are several reasons why older people go on holidays:-
1. It can be cheaper than living at home. (At the right time of year, holidays can cost a pittance. Equally, winter holidays can cut energy costs.)
2. They can see a time when they will no longer be able to go on holiday so go while they can. (Friends become housebound, inactive, immobile.)
3. They have to. There are older people who downsize to park homes only to find they are eleven month residences.
4. Company. If you live alone, holidays can be a way of forced companionship.
5. Something to do with their time.
This is not to negate the message quoted above because many older people do go for enjoyment and as a 'reward' for their working lives (encouraged by advertising and maturing insurance policies) but it is by no means the only reason why, and for some, they have to make sacrifices to take these holidays.
I have used the message (#76) to hang my argument on, not to argue against it.