A little genocide in nursing homes and retirees in general will help the budget.
He's not stupid, and he certainly, one highly suspects, knew the potential and really unthinkable consequences of his considered actions.
Older Americans are more likely to be a burden on services, have greater recollections of how great America was in the post war boom, have greater senses of Family, Honor, Duty, and Responsibility, and are more likely to vote Republican.
Additionally, older Americans were much more likely to take shocked offense at Mister Cuomo's choice of words when he insulted them and our way of life by asserting "...America was never that great."
Epidemiologists will be able to look back and determine if any or just how many icky, horrible deaths resulted from Mister Cuomo's choice.
Perhaps psychologists will be able to determine why and also why he is not at all bothered, conscience-wise. (That Cuomo blames DJT will help the diagnoses, one supposes.)