Once a CEO hungers for a deal, he or she will never lack for forecasts that justify the purchase. Subordinates will be cheering, envisioning enlarged domains and the compensation levels that typically increase with corporate size. Investment bankers, smelling huge fees, will be applauding as well. (Don't ask the barber whether you need a haircut.) If the historical performance of the target falls short of validating its acquisition, large 'synergies' will be forecast. Spreadsheets never disappoint."

Do you agree with Buffett? How can you make sure this doesn't happen/why do you think it doesn't happen?