It's not politicians of one particular party or another who have an 'EUREKA!' moment in the bath and rush into Parliament with ideas for new surveillance powers. They are persuaded / cajoled / wearied in backroom conversations and presentations by career civil servants who can outlast any uncooperative Government ministers.
Teresa May might have a front-line political career of 15 to 20 years. A senior civil servant is just starting his rise to power by then.
> "I have nothing to hide, why should I care?"
Alternatively "There's nothing I can do about it, why waste my energy fighting it?".
That reminds me to update my archive of crypto source-code.
Both of which, of course, Theresa May wants us to get rid of, so UK citizens will have /no/ constitutionally-entrenched rights.
I've suspected for years that Americans would understand our government better if we had a domestic version of Yes, Minister. Not House of Cards or The West Wing (though that came closer), but something that captures the petty pressures and intransigence of an entrenched civil service.
The fact that so many people adhere to this statement indicates the point at which society currently is in its downward cycle:
Pretty much at the beginning.
Once the general statement turns into "I just can't take the pain anymore" it means that society will have reached the bottom of the cycle. From there on out, the real fight will begin and things will start to improve again.