Experiments report loss of motivation to do toy tasks. I can imagine people losing motivation to do those, or participate in the study, after meditating. Not sure how that translates to lack of motivation in doing what you actually like/want to be doing.

The nap analogy from the article, I find, is very good. After taking a nap, it might be easier for you to concentrate and do deep work. If you need to do something tedious instead, like respond to admin emails or perform made up tasks for a meditation study, you might perform better pumping some loud music or being under social pressure.