From the looks of the result, people tend to trust those that "Keep them safe". Where as distrust seems to increase with those who take money from them for repairs (mechanics, plumbers, electricians). I find from my experience working in the mechanic industry, people tend to not believe that THEIR car, pipes, wires couldn't possibly be broken. Then we have those who generally work on commission; Certain Lawyers, Car Salespersons, Telemarketers, and the like.