Not that this is a company I would want to run, but there is more to this. Returns may be marginal, but so are the salary increases. You're not typically paying

Not that this is a company I would want to run, but there is more to this. Returns may be marginal, but so are the salary increases. You're not typically paying one engineer $120k to work a 40 hour work week and another, equally talented engineer, $240k. Moreover a 10x engineer doing 6x work for 80 hours is still more productive that 12 engineers working 40 hours/week.