> job offers are 30-50% above national prevailing wage.

Making $70k in some midwestern city will get you a better house, better access to education for your children, and generally better quality of life than what $200k will get you in the Valley. I know people who've lived in both worlds tell me exactly this.

So, having offers at 30-50% is not a good thing, it's a bad thing. It should be much higher than that.

What does the "national prevailing wage" have to do with the "prevailing wage for a software developer in SF", which is what I was talking about? San Francisco is a tiny city, and I am only talking about San Francisco since that is where the job I linked to is located.