Without discussing which provisions (and they are actual laws, not loopholes, because many/most are intentionally there) we should be eliminating this is all just a lot of handwringing.
The tax bill paid by new grads for their rsus is usually their first experience with non-income tax flavored taxes, and I think we have an incentive to ask for cash in leiu of rsus for that exact reason. Of course, not going to complain too mich.
The employee gets most of the benefit of RSU’s. They’re taxed as cap gains, maxing out around 23% while cash is taxed at the marginal rate, closer to 50% all in with state and federal and a FAANG salary.
Then when the employee sells the stock, the diff from vesting price is naturally taxed as cap gains/losses.