Buffer is posting $2M annual revenue this year, if I recall correctly. Their paychecks aren't being signed by investors -- they're being signed by customers.
Look, not saying they can't do it.. just saying as an investor, I'd wouldn't support it. Money is after-all fungible. It doesn't matter if sales are paying for 100% of the salaries or not... if there's money being left on the table that can be reinvested into the company by either bringing in new/better talent or retaining your top talent, I would be angry. The founders already have high incentive to stay as long as they can satisfy basic needs on their salary. Employees with little equity do not unless they are paid competitively.