Money makes it possible for people to afford food and healthcare
Technically incorrect. Food and healthcare are food and healthcare. In an apocalypse you have food if you have food and you don't have food if you only have money. To make your statement work we need to introduce additional assumptions.
Wealth allows for MORE food to be produced and healthcare to be provided.
Now that's a nonsensical statement if I ever saw one. A stockpile of velvet curtains does not allow more food to be produced.
How is food produced today? Using very expensive machines and fertilizer and carefully bred seeds. That is all wealth.