> The average person is largely indifferent to mass surveillance
I think you would be surprised. Now, whether or not the average local politician is indifferent is not the same as the average person.
What's typical is saying "I have nothing to hide" or valuing a bit of convenience over privacy and other principles.
In a poll of "do you want to be surveilled", "do you think mass surveillance is good", sure. But in terms of revealed preferences, people will happily give up privacy for mild convenience.