Its cool that developers now have a tool to figure out how much they are worth in the workplace. In there interest of intra-forum-sharing, can this forum use that calculator and tweak it to be useful for figuring out what flight instructors, aviation mechanics, various types of commercial pilots, etc, are making based on experience, location, education, etc?
The SO salary calculator is only a gimmick to promote their jobs website; it doesn't actually work in most countries or for most developer skillsets. The input to it is based on SO's annual survey, so to make a similar product for aviation, we'd first need a similar survey. This site isn't popular enough among professional aviators (like SO is for developers) for such an investment to make any kind of financial sense for the company.
Unfortunately, Dan is right. The salary calculator makes sense for Stack Overflow because we have the data (annual developer survey), we have the audience (SO gets two orders of magnitude more unique visitors than Aviation), and we have something to sell (Stack Overflow Jobs/Talent).
The salary calculator took a lot more time to build than you might expect, and there's really no chance we're going to invest in an aviation calculator.
If someone in this community wants to build an aviation salary calculator, I'd recommend setting it up on your own. There are probably ways to build it without requiring a sophisticated backend, and something free like GitHub Pages might even work. Then, if the community thinks it's neat and wants to promote it, create a community ad.
Before anything else, please note that we are not a forum. A forum is a place for discussion, this is a Q&A website, the working principle is a bit different.
Now, semantics aside, you are proposing something that, even if we wanted, we could not do. This is in the hand of the network administrators.
You could try to propose such a thing on the main meta, after having collected here enough support in such a tool, but personally I think that the chances of it happening are quite slim, this website is definitely not among the largest of the network, so I'm not sure that such an investment could be justified at this stage.