For most of the 43 years that my Dad worked, he always took 15-20 minutes after lunch for a nap, even though he worked in a traditional, professional, office environment. It would appear that this idea of rest time is becoming more common and accepted – this company Podtime have been installing sleep pods in UK workspaces for some time now.
And according to a Pew Research study from a couple of years ago, napping for those earning above $30,000 but below $100,000 a year was below the norm, but above $100k it went back up.
So if you are looking to jump a pay bracket or two get the (sleep) blinders on!