They needed people to be 'on the train to the camps'. Camping at home this round. Locked down for years. They wanted to 'wash the deck'. The deck being humanity.

Selling saline and some death jab; that gives you money to increase capacity.

Don't let everyone die right away. Illusions need to be maintained.

Make the process unavoidable and permanent . We can then kill as needed, using statics and media to tell the story we want about these extra deaths.