Earlier quoted context omitted.
I seriously doubt the lead developers of a team of 4 make more than $11k in most of Europe.
Usually the product of a team of 4 is not that well known nor successful. And you can't really compare the average developer with the three developers mentioned since they are clearly outstanding and could get hired by almost any company.
(But also no, his salary is not what bankrupts Babel. It is too low for that.)