Several quite opinionated industry titans who appeared to ignore most things they didn't themselves invent in AT&T for UNIX or in Plan 9, and based on their own preconceptions of "programming at scale" as a pet project (not based some formal Google-initiated research on its practical needs).
Algol and ADA were indeed created by "experience of several industry titans", in a process examining the field of applications and use cases for the languages.
Go was not really that, whatever the story says.