Are you arguing that the purpose of secret salaries isn't to keep employees from a better understanding of how much the company would be willing to pay them? We can have that discussion, but it would help if you made a coherent counterproposal. If you claim that open salaries cause significant friction between employees, for example, please cite comparisons to the countries and business where open salaries are common; there's enough of them that data should be available.

I've made no argument at all. If you'd seriously like me to make one, I'm going to require funding.