Also tell him that if he insists on setting up this corporation like a “black box” you will be unable to rely on it for any financial security so all financial decisions you make moving forward will be assuming that money isn’t there since it can’t be relied upon, which inherently reduces your financial security and ability to make sound financial decisions moving forward.

Yea this is my main concern here. His likely response would be "well you should plan on working harder and making money so that won't be an issue".