Answer:
The number one retirement related problem in developed countries is:
healthcare costs
Step-by-step explanation:
With retirement, the healthcare costs increase because most of the retirees who are no longer in the physical mood to exercise will need to be taken care of their health. Retirees tend to have increased level of health-related complications. Even for those who are physically able, there is still increased need for healthcare. And other retirees will develop eye treatment complications. All these increase the healthcare costs. So, the most important retirement related issue is healthcare costs and not elder abuse, dependent children, or housing.