I was making this assumption as well, and I think PD is saying this will not change premiums because the entire program does not operate on free market rules anyway. I don't really understand, but I don't understand virtually anything the government comes up with.
This is why both political parties are bad. The repubs see a problem and do nothing. The dems see a problem and insert inappropriate amounts of government, even if it was the government causing the problem in the first place. Under both the issue gets worse.