GP's point likely is that, by taking a salaried job, you're agreeing to take a low-risk, steady income. You do that, because you don't want your take-home pay to suddenly drop or disappear because the company had a worse month or quarter, or because you had a worse week. But this cuts both ways - you trade away the risk, you trade away the reward, so if the company has an excellent financial quarter, you're not entitled to any extra money because of it.