I'm flummoxed as to how someone can not see this. Can you not run a little thought experiment on yourself, like...
"How much could I get done if every 3 days, I told someone to stop in the middle of their 4 day task and do something different?"
It's not 'management rocket science', it seems it's just basic human behaviour. If every couple of days, someone kept giving the CEO new/different tasks, would he ever expect to be able to get anything done? How can you not see the root cause of such a plain-as-day problem? Willful ignorance?