Politicians will come into power completely at the mercy of the police and secret police.
The percentage of the peaceful population being spied upon, no matter which government is in power when it is increased, will end democracy.
The reason it will end democracy is that it will cause intelligence agencies to have huge banks of information on the childhood and teenage years of future politicians.
Future politicians will come into power completely at the mercy of the police and secret police, completely under the thumb of police and secret police.
Judging by how government politicians in the USA, UK and Canada act towards intelligence agencies and police, we may already be there and just the rest of us don't realize it yet.
Spying on the peaceful public is an issue on the totalitarian/libertarian political axis.
Spying is on the peaceful public is not a left-wing/right-wing issue. Stalinist, Maoist and Marxist Communists do it. Nationalist socialists did it. Absolute monarchies do it.