Low crime rate. Less crime, less death and injuries.
High percentage of old people working. Working means more money to sustain life and pay medical bills.
CPF. You and your employer pay a percentage of your salary to government as CPF. This will be used for medical insurance and pension.
Good air quality and cleanliness in general. Helps in certain diseases.
Also means old people carry on getting exercise and feeling like they are a useful part of society.