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Pink argues that the reward-and-punishment model of motivation works for routine algorithmic tasks and fails for work requiring judgment, creativity or complex problem-solving. He organises the argument around three elements of intrinsic motivation: autonomy, meaning control over task, time, technique and team; mastery, meaning the pursuit of getting better at something that matters; and purpose, meaning connection to an objective beyond the self.

The research he draws on includes Deci and Ryan's self-determination theory, Harlow's early primate work showing that monkeys solved puzzles without reward, Deci's finding that paying people for a task they already enjoyed reduced their subsequent voluntary engagement, and Ariely and others' finding that very large incentives degraded performance on tasks requiring cognitive effort. He also cites the candle problem, where a functional fixedness task is solved more slowly by people offered payment.

His practical recommendations include results-only work environments, allocating unstructured time as Atlassian and 3M did, paying people enough to take money off the table, and shifting from if-then rewards to unexpected recognition after the fact.

The evidence is more contested than the book presents. The undermining effect of extrinsic rewards on intrinsic motivation has a mixed meta-analytic record, effect sizes are modest, and the finding depends heavily on task type and on whether the reward is controlling or informational. Many of the corporate examples have been discontinued, including Google's twenty percent time in its original form. The autonomy, mastery and purpose framing is useful as a design vocabulary regardless of the strength of the underlying studies.