Earlier quoted context omitted.
Say you write some code that increases conversions by 0.01%. Thats worth 10 bucks to momandpop.com compared with millions to Amazon. No wonder that programmers can make more at Amazon.
Analogy doesn't really hold up. Increasing conversions by 0.01% probably takes an hour at momandpop.com and maybe a year or more at Amazon. Not to mention low-hanging fruit already being picked at large corps.
This field has a ton of natural incentives to scale as big as possible. I feel like the main beneficiaries of breaking up big tech companies are business people and lawyers getting to insert themselves everywhere to interface between groups that used to be the same company.