This is precisely my point. For almost all of human history, public health was indeed a luxury rather than a necessity. In many parts of the world, it still is

This is precisely my point. For almost all of human history, public health was indeed a luxury rather than a necessity. In many parts of the world, it still is today. The details of a specific proposal are not relevant. No matter what specific items you choose for these categories, eventually people will want things you say are "extravagant luxuries" and call them "needs".