To be in the S&P 500 index a company needs to be normally profitable
(Outside the S&P ~40% of corporations are not.).

37 of those 500 companies have profit margins > 30%.
~10 of them are listed below.

88 of those companies have profit margins below 5%.
~20 of them are also listed
For them the brutal math applies.
A misguided policy from inside the beltway could wipe out a lot of profit, a lot of jobs, and a lot of grandma’s retirement fund.

(All profit margins as per most recent fiscal year)