The Truth About Lying to Get a Job
resumelab.com
resumelab.com
Also, if HR weren't such dolts that can't connect dots on a resume (eg - fungiblity of skill set), then we're forced to enhance our credentials as a way to guide HR into drawing the correct conclusions.
Finally, as for grad degree holders lying more, that's probably due to people taking grad courses because they'd like to get to the next level in their career (eg - management), but there's been little to no opportunity to do so at their current place of employment.
Just my 2¢.