In his own words · Incentives
“Perhaps the most important rule in management is, 'Get the incentives right.'”
— Charlie Munger · The Psychology of Human Misjudgment (Poor Charlie's Almanack)
As recalled from The Psychology of Human Misjudgment (Poor Charlie's Almanack) — the sense is right but the wording is not verbatim.
From the FedEx night-shift example in the Misjudgment essay; wording varies slightly across editions.