Tesla shareholders have approved Elon Musk's multi-billion-dollar pay package.The package is now worth $44bn (£34bn). The package was once as much as$56bn (£44bn) but has declined in value in tandem with Tesla's stock. The proposal passed despite opposition from some large institutional investors and proxy firms.Onstage at the annual shareholder meeting in Austin, Texas, the billionaire described himself as "pathologically optimistic"."If I wasn't optimistic this wouldn't exist, this factory wouldn't exist ...