Michael Sandel asked what happens once literally everything has a price tag

In What Money Can't Buy, philosopher Michael Sandel catalogues the creeping spread of markets into places they'd never gone before: paying children to read books, buying a place in a queue, purchasing another country's right to pollute. His worry isn't just fairness, that money lets the rich buy what the poor can't, but corruption: some goods, like a wedding toast, are degraded by being bought and sold at all. Markets, he argues, aren't neutral; they change the meaning of what they touch.

— Michael Sandel, What Money Can't Buy: The Moral Limits of Markets — 2012
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