Two exemptions I can think of are health/dental insurance (exempted by law) and free food at Silicon Valley campuses (highly contestable benefit as far as IRS is concerned, the jury is still out on treatment of that).
How can one hide virtually their entire income while still being able to enjoy most of the benefits?
A large group of people (plumbers, electricians, landscapers, solo real estate agents) are actually incorporated and self-employed under this model, and yet are not massively wealthier in comparison to the rest of the population.