Around 2005, a Yale Psychology PhD candidate asked me to write a web-based survey instrument with various questions, some on complex but straight forward business questions (the controls) and others with moral/ethical aspects. Senior executives participated and they answered similarly to rank & file, often completing the entire survey much faster. What they didn't know -- we were tracking how long they spent on each question. Questions with moral/ethical concerns took senior executives relatively longer than the rank & file.
Late Addendum: Sorry that I don't recall the author/paper. The survey population spanned multiple industries representing many Fortune 500s, including huge tech companies. The survey was the same for everyone. The questions were story problems from business and law school case reports. The participating companies were anonymized on our end. We provided HR departments with survey link; only subject rank (not identity) was collected. Survey was voluntary, with informed consent according to IRB approval.