I wonder if there is an evolutionary reason behind this, such that people who are less stressed (more altruistic or empathetic), have more resources (no need to

I wonder if there is an evolutionary reason behind this, such that people who are less stressed (more altruistic or empathetic), have more resources (no need to work multiple jobs, not living paycheck to paycheck, not sleep deprived from multiple shifts, etc.) and this is a signal of reproductive fitness?