I find it rather implausible the guy driving the phone truck makes 120K/year.

Explanations????

Not US Dollars
Manages the other guys driving the phone trucks
Owns the company and <see above>
Lives in a city where 6 figures don't pay the rent
Finds one job a year to rewire an entire 6 floor building for 120K
etc, etc, ad nauseum, que es do ne um <thunk>
There's no such thing as a bulletproof contract

This coming from a guy with 20 years service in a highly desirable field (you're using one of the devices now).

Hey - I could be wrong but here's google's results:

Salary

An estimated 156,350 telecommunications line technicians worked in the U.S. in May 2010. The average salary was $50,080 per year. Salaries ranged from $26,910 to $73,320 per year, which includes the 10th through 90th percentiles. The 25th percentile earned $35,180 per year and the 75th percentile earned $64,890 per year.