I think you're massively underestimating overhead. Each person who works on a product should make a max of 15-25% of what they bring in. If you have a repair shop and you charge $100/h, you should be paying your techs $15-25.
$1 billion a month is about $1.4 million an hour 24/7.
$300,000 + ~$50,000 in benefits / 260 working days yearly / 8 hour work days is about $170 an hour.
That works out to earning about 0.012% of what they bring in.
Netflix is a bad example because, like most media companies, the vast majority of their expenses go towards media licensing and production. So while it's easy to paint their engineers as overpaid compared to the labor market, it's very difficult to paint their engineers as overpaid relative to their product.