When I moved from academia to industry, my salary doubled in about a year (without ever asking for a raise). The academic job (at MIT) got a pay scale increase that year, but the pay increase from changing employers would have still been more than 50% with the job change (considering only base salary: otherwise the difference was much, much greater). That was more than 7 years ago, and I only recently got over the feeling of being massively overpaid. It helps that I'm rather comfortable living in poverty.