enough money means having the opportunity for food and medicine.

Also one more thing is having people to do work for you. Having money means that you can easily have the chance to get maid and other people to do the work when your body can't. And that also means that with enough efforts money can literally help during old age, mid age and times when the getting external help is hard. People only respond to money when you are in trouble, people respond with kindness when you do favours. I feel in that approach, having money is utmost necessity.