If he is paid as a "contractor" rather than an employee, he doesn't have taxes withheld - social security, income (federal, state, local), Medicaid, etc.
Does he drive a car without insurance or proper licensing?
Does he use the emergency room as he has no health insurance?
If he isn't paying all his taxes then either he or his employer or both are not paying their full share of the burden of running our country. Likely his employer is not paying the employer share of Social Security and cutting Victor's pay rate since Victor isn't paying taxes. So the employer is either able to undercut the competition or pocket more profit than the competition.
Sales taxes are just a part of paying for our society.
If he is driving, I think there is a good chance he has neither license nor insurance. I could be wrong. He may be operating like some people in Appalachia. They just hope they doesn't get in an accident they can't drive away from. They make the people who do get insurance pay extra to cover those who don't think they can afford insurance (or would rather spend it on something else).