> Other professions have done what you have stated (i.e. certification) and seen higher wages than otherwise which also proves my point.

I'd generally agree with that if it regards to safety (e.g. industrial control systems), but we manage that by certifying the manufacturer, not the individual developer. But otherwise I think it's harmful to society, even if beneficial to the individuals - but there's a lot of things falling in that bucket, and it's usually not the things we strive for at a societal level.

In my experience, getting better and faster has always translated into being paid more. I don't know that there's a direct relationship to specific tools, but I'm pretty sure that the mainstreaming of software development has caused the huge inflation of total comp that you see in many companies. If it was slow and there's only this handful of people that can do it, but they're not really adding a huge amount of value, you wouldn't be seeing that kind of multiplier vs the average job.