The only way to achieve this, is to eliminate EVERY kind of asymmetry in society (which we should have achieved a long time ago, since we all always pretend that every life has the exact same value). If you keep any kind of asymmetry within society and accept mass surveillance, democracy is dead because mass surveillance will of course be abused to increase and further protect power monopolies.
This means, every kind of power would have to be distributed equally over every citizen. And that also means that everybody would have to receive the same amount of money per hour of work (all education being paid for by everybody, meaning entirely financed via taxes).
While that would be the perfect model and the most sane one, I doubt we are culturally mature enough to get there fast enough.