Somebody working in the U.S. must be paid at least minimum wage.
You cannot work in the U.S. while present on a tourist visa.
So your employer is violating labor laws, and you would be violating immigration laws. If you are caught working on a B1/B2 visa, you can anticipate being ineligible for the visa waiver program in the future, and may have great difficulty entering the U.S. or getting a visa.

