More accurately: If me and me friends lemonade stands makes $1 million on it's own and your lemonade stands makes $1 on it's own. We bring them together and make $1.1 million because we had an amazing product and you are an amazing sales guy (yay!).
How do we divide the extra $100k. Are you pretending that you should get $50k (50 thousands times what you were doing alone) and we should get $50k (1.005 times what we were doing without you) as well ? That does not seem very fair to me at all.
Some of that extra $100k should probably go to the company, but sales is maybe not the best example because salespeople are quite often paid on a base+commission basis and would easily get a fixed percentage of all of their sales for the year. It seems high for sr engineers to make $500k/yr but it should be noted that senior sales people can also make $500k/yr if they're doing well!
How do we divide the extra $100k. Are you pretending that you should get $50k (50 thousands times what you were doing alone) and we should get $50k (1.005 times what we were doing without you) as well ? That does not seem very fair to me at all.