I had to dig for a minute to find it. The sampling is a little bit questionable but not in a way that seriously impairs this study I think.

The sample is 107 people that signed up for a Mechanical Turk poll about their work habits. 27% came from customer service jobs, 17% came from Information Technology and 11% came from research and development.

I suspect that if you had a better sample you would find that this way of thinking is very endemic Within "high pressure high reward positions."

Customer service workers can be busy but it is the supervisor's job to put bodies on the line. They often use guilt trips about how busy they are and how they are short-handed. That particular in the last two years the prevailing sentiment seems to be that that's the company's problem and not the individual's

On the other hand for people like a software developers or lawyers or accountants, you are usually working with a team of people on a specific task and you have a workload that is individually assigned to you. Being busy means that you have more work than you can reasonably complete and often it will simply be waiting there for you when you return.

I suspect that would be the core demographic of people who say things like " God I'm so burned out I need to take a break, but I have too much work to do."