I took one glance at the chart and decided the results were impossible because of that.
Apparently "top executive" median pay is $105,350 per year: https://www.bls.gov/ooh/management/top-executives.htm
Sounds plausible? Even a company with 100 employees and few growth prospects is likely to have a couple of executives, and most companies are small.
Remember that exec tech salaries are extreme outliers. I worked for an exec in manufacturing. He had full p&l responsibility for a business segment with ~150 employees, $27 million in revenue at 40% gross margins, and a production plant. His total comp was ~$300k.
Now just think of the comp levels in sectors like government, education, etc.
This is also base pay