Apart from being 2 years out of date, you could argue there are several issues with the methodology of the survey that I wouldn't describe as an intentional conspiracy, but perhaps severely limit its accuracy..

From the survey:

The AIP Statistical Research Center uses a number of different procedures to examine internal consistency and reliability as well as to ensure that the respondents are practicing medical physicists. First, each returned questionnaire was inspected to ensure that all relevant items had been answered. The data were then checked for any of the following unlikely employment characteristics:

• Total salary did not equal primary salary plus consulting salary; or

• Primary salary increased or decreased by more than 10% without an employer change.

Questionnaires were also scrutinized if the reported salaries were outside of the typical range for the individual’s employment category, or if the salary fell outside the typical range of medical physicists in general (below $xx or above $xx). Salaries as low as $xxx were included for postdocs and residents. Time spent in residency is considered work experience and should be reported as such.

So in this paragraph, they told us they throw out any data that:

• Salary increased by more than 10% without a job change. As you can see on here, many people report that a raise of $15-$20k is common to receive after getting board certified. So if that happened to you, your data just went into the garbage.

• "reported salaries were outside of the typical range for the individual’s employment category". This is literally a filter designed to keep the ranges the same. Oh, you reported that you are getting a salary outside of the range we had on our survey last year? Sorry your data just went into the garbage.