Republicans argue this is necessary because it would also let insurers charge younger people less, which would encourage younger and generally healthier people to come into the insurance pool — and therefore bring down the overall cost of health care by making it so more younger, healthier people are effectively subsidizing everyone’s care.
The CBO found that’s broadly true: It would bring insurance premiums down in general, and it would cost at least some young people less to get signed up for a health plan. But it would do all of that at a very high cost to older, particularly poorer Americans.