Do employees with a master s in public health get paid more?

Yes, employees with a master's in public health get paid more. However, while having a master's will likely get you more pay than just a bachelor's and open up a few more job opportunities, like epidemiologist, public health isn't a well-paid major. It's unlikely the difference in pay will recoup your costs.

As it's public-focused and generally in the public sector, public health careers aren't highly compensated as a rule. There are other benefits of working in the public sector, such as generally having comprehensive benefits, but it's not a major to pursue if the size of your paycheck is a major motivator for you.