They’ve been talking like this forever. This is simply the way that Republican idiots think here in the US. That’s why the party itself is a what I would call a toxin. The party to me isn’t really a political party; it’s more of a substance akin to snake venom. It’s dangerous, toxic to mind and body, and you regularly need antidotes when you subjected to it. Hearing Republican ideology is like getting bitten by a rattlesnake.
In order to under why insane Republicans talk like this (and have been for decades) you need to understand crazy US society. In the US, everyone insists that there are no classes at all! Somehow or other, everyone is middle class! There are no rich, no such thing.
This is why you get Republicans saying $450K is middle class. It’s a denial that classes exist at all in the US. If you say there are no classes, then there can be no such thing as class war in US society. Of course, class war is constant and vicious in the US, but if you deny that it exists, a lot of people will just say, “There is no class war.” When a lot of people deny this, most of the lower classes will not want to engage in class based actions because there’s no such thing as class war. Of course the rich know full well that there is class war in the US and they are masters are practicing it. This particular type of nonsense that that comment sprung from is an “Americanism.”