IN THE COMMENTS: rehajm said (efficiently): "Natural efficiency."
Tim Maguire said: "The smart people we've heard of aren't lazy." And by that, I assume he means that the smart and lazy people are being efficient by not drawing attention to themselves. The workplace is often administered by people who want to see that you're hard at work. The stupidest waste of time is looking busy, but it would be stupid to attract the supervision of somebody who will impose the requirement of looking busy when you have worked out ways of getting things done efficiently and want to benefit from your cleverness, not cede all the benefits to your overseer.
I have been in situations where a colleague will go on about how stressed out and terribly busy she is and assert that so are we all. The dead silence in a roomful of professors is ludicrous. You know damned well that many — I hope most — have figured out ways to work very efficiently and enjoy the freedom and flexibility of the job. But no one with an eye on self-protection will stand up and admit to not being a workaholic. And so stressed-out, busy-busyness is the atmosphere that prevails because the ones who talk are the ones who haven't found the lazy-smart path (or they have and want to deny its legitimacy for some sadistic reason).
ADDED: I recommend "Essays in Idleness" by the Buddhist monk Kenko, "In Praise of Idleness" by Bertrand Russell, and "An Apology for Idlers" by Robert Louis Stevenson. That last one begins:
BOSWELL: We grow weary when idle.Gasconade... There's a word you haven't used in a sentence recently, I'll bet.
JOHNSON: That is, sir, because others being busy, we want company; but if we were idle, there would be no growing weary; we should all entertain one another.
Just now, when everyone is bound, under pain of a decree in absence convicting them of lèse-respectability, to enter on some lucrative profession, and labour therein with something not far short of enthusiasm, a cry from the opposite party who are content when they have enough, and like to look on and enjoy in the meanwhile, savours a little of bravado and gasconade. And yet this should not be. Idleness so called, which does not consist in doing nothing, but in doing a great deal not recognized in the dogmatic formularies of the ruling class, has as good a right to state its position as industry itself....