It's probably worth quantifying benefits in the context of hourly rate.
Physician A works for a CMG and makes 250/hr, working 120 hours per month for 12 months, making 360k per year.
Physician B is a W2 for a hospital and makes 210/hr, working 120 hours per month for 12 months, but receives a retirement match that comes out to 25k per year, 5k per quarter on incentive bonuses, 5k of CME spending that can be used pretty liberally, 2 weeks (I.e. 60 hours) of paid vacation per year, a health insurance plan through work that saves him or her 500 a month on health insurance premiums, dental and vision insurance that saves 50 dollars a month, disability insurance to save 5k per year, and life/accidental disability insurance saving them 1k per year, and you end up with a physician that actually makes about 375k per year, or about 260/hr and that's before accounting for the savings on payroll taxes.