This is for me the single most disturbing part of his address.

Biden is not saying that vaccination is or should be legally compulsory. There is in fact no law in the US which says that vaccination is compulsory.

However he is trying to make it in effect compulsory by getting the Department of Labour to force private companies to make it so.

In other words, vaccination is being made in effect compulsory, but without law.

The honest thing would have been for Biden to come forward and say that vaccination should be compulsory, and to propose a law or laws to Congress and to the states to make it so. However he is afraid to do that, so he is hiding behind private companies, who he is trying to get to do the same thing for him.

It is the abdication of responsibility and accountability in what is still supposed to be a constitutional Republic.

If it also reminds you of the way the government now uses the Big Tech companies to police online content for it, so that it can avoid being held accountable for violating the First Amendment, then so it should, because it is in effect the same thing.