Sorry I don't see why this is true? If you're in an income sharing agreement, the only way for you to make more money is to work more, but this is how it works

Sorry I don't see why this is true? If you're in an income sharing agreement, the only way for you to make more money is to work more, but this is how it works for people who don't have income sharing agreements too. The motivation isn't changed, one person just has more take home pay than the other person. (And if that person has a loan instead of an income sharing agreement, the disposable income between the two individuals are identical)