Does anyone seriously advocate getting a high GPA in the US anymore so that you can out-earn your peers?
Does anyone seriously think that the leaders of companies are the studious academic experts in their field of choice?
This is a paradox if you still pretend we live in a hierarchical meritocracy. To a certain point and income level we do; bad grades and no social connections won't help you.
But if you can choose entering a class of rich and powerful people or getting a higher GPA, and your goal is financial reward? Come on now.