> doctors will not he higher in shomayim than plumbers
There are several questions here, what are your answers
1. Is there a mitzva of doing chesed, saving lives, caring for sick.
2. What is schar for that when you are well paid. I asked this shaila and was told that as long as the person is motivated to do chesed rather than higher pay, he is a tzaddik. The rav is anti college, all of his children are tchim or businessmen, but one brother is a doctor.
3. Should the person strive to do more mitzvos if he is capable.