Yes, you may find some prevailing wages are lower than what Google pays, but that shouldn't be surprising since high paying tech jobs don't represent the average wage.
The required wage is the higher of prevailing wage and “actual wage,” which is what other employees with similar duties, experience and qualifications are paid.
The separate $60,000 minimum is often misunderstood and not accurately reported in the news media. There is a rule that “H-1B dependent” employers (employers with a certain number or percentage of H-1B workers) need to make a number of attestations, including that they do not displace US workers and try to recruit US workers before hiring an H-1B worker. These are not generally required for H-1B petitions, which normally only require a specialized occupation and a certain wage.
But if an H-1B worker is paid at least $60,000 or has a master’s degree or higher, those attestations are not necessary, and the general H-1B rules apply.
If you have programmers being paid anywhere from $80K to $150K for a given skill set, the average is going to be lower than what the top companies pay.
The only way around that is to create another subset of programmers that only look at the highest wages.
And if an employer is found to have abused the system (hired someone for a lower position and then made them do higher-level work, e.g., call them "tech support" when they're really a senior engineer), then force the company to pay the H1-B the equivalent of 100 years' salary and put any employees found to have been complicit in this in prison.
Aren't there jobs whose prevailing wages are closer to the minimum?