I think this may be an unpopular opinion, but targeting free vaccines at people who are economically less capable of getting it themselves makes sense.

Also, from an economic utility standpoint it makes more sense to keep workers safe than to keep retired people safe. It's a very macabre calculation, so it's possible the authors are using race as a smokescreen for their actual purpose here which is to get the economy running better. I don't think it's likely though, because the left wing hasn't cared about the economy this whole time so far.

The real problem is that they don't care about economics, they only care about race. Race isn't a privilege factor, it's economic class. Dirt poor whites in the south are incredibly disadvantaged, but you wouldn't hear a leftist caught dead talking about their struggles with systemic disadvantages.