Question

Why do developed countries have a better medical facilities

Answer 1

Developed countries have better medical facilities because they have more money and are able to afford equipment which is often very expensive. Due to having more money, their medical facilities can be equipped more expensively. While this doesn't always mean it is a better facility, it often is the case. 

So in a nutshell, because developed countries have more money, they are also able to provide better healthcare and better medical care in their medical facilities.