GP is saying that they’re okay giving up buying first-class tickets if it means someone else gets to live. (Because they pay more for health insurance, which allows someone else to pay less.)
It’s relevant because while the comment says that “they’re okay giving up buying first-class tickets” what they really imply is that they want everyone to give up buying first class tickets.
If they want to constrain their own choices to help a nameless “someone,” they can literally do that themselves without involving the taxpayer at large. Just send the check to HHS or to a specific charity or individual.