Batman episode and binary poisons

[link to dcau.fandom.com (secure)]

What better way to thin out the populace than to create a similar situation with a vaccine. Push for the numbers to achieve maximum effect. Use bureaucracy to quantify, taxpayer dollars to fund. Then when your magical percentage is reached, spray the crowds with "Perfume" or... make it rain. Nobody would conceive of such a thing right? Go back up and reread that story.