Skills are directly related to your income, and USCIS considers this and will label your ability as “extraordinary” if your income is comparatively higher than others in your field.
Firstly, the comparison should be made on equal parameters. That is, you cannot compare your gross salary to another’s base salary and submit the comparison as a piece of evidence to the USCIS.
Having a high salary is an advantage in this world, and getting your US visa because of that salary is a blessing. Suppose you are among them and want to travel to the US on an EB-1 visa under the “alien of extraordinary ability” category.