I believe he is referring to the safety of a stable income, which such protectionism attempts to provide. If someone can come in and try to do a better job, the

I believe he is referring to the safety of a stable income, which such protectionism attempts to provide. If someone can come in and try to do a better job, then you are always at risk of losing your revenue stream. If the law prevents competition, then you can feel more secure in having that revenue stream for life.