That already happens a fair amount. I've had two orgs where for stretches of time my top guys cleared more than I did, and I've known others in the same boat (they ran "rockstar" SME teams of various types). I wasn't offended by it either. I gave them air cover and they did exceptional work largely undisturbed, and periodically asked questions that made them not get too comfortable in the status quo. It was a fair trade off.

But ICs making more than managers is not what should be normalized; building teams with structures that optimize for performance rather than "management by spreadsheet" will get you further than just one dimensional rules about comp, especially in larger orgs where the comp tiers are deep.