Is there much evidence for the reverse? Ignore the US Patriot act bullshit and focus on democratic countries where the political system isn't fundamentally broken.
All governments will use (or abuse) the powers they have to the absolute maximum extent they can get away with which is why subsidiarity is so important. The less power any individual has, the less damage they can do by using it as a tool for their own self-interest and the more they're forced to build consensus with other influential people which limits extremism. If it were up to me I'd abolish the office of Prime Minister altogether in favour of strong Cabinet collective responsibility and I'd also create an anti-corruption body completely outside of Parliament and the other institutions of state with wide-ranging powers to seek and punish misconduct in high office. Political office is an absolute magnet for people with unpleasant personality traits, instead of assuming good faith in politicians we need to assume bad faith and build the machinery of government defensively to accomodate this.
Another remedy to our issues is abolishing general elections in favour of rotating, asynchronous by-elections. This would give us exactly the same amount of democracy, but it means that the media's influence is massively reduced due to a lack of national election campaigns and it also means parties are forced to stick to their manifestos as they're effectively forced to campaign locally at all times so pulling a Nick Clegg becomes much more risky. As well as preventing the election result essentially being a function of how good the media strategy is, it also means the makeup of Parliament changes much more gradually which allows for long-term planning instead of the insane pendulum swinging where nothing gets done if it takes more than five years.
I like your election formula. My ideas was to allow people to change their vote whenever they like. Crappy decisions would have to be paid for in votes immediately. Ideally after one truly bad move you are out the next day and the bad move is immediately reverted.
I quite like your proposal for elections too, although its implementation might be difficult when it comes to paper-based electoral systems! It would be interesting to see what effect it would have on the Overton Window, I suspect it would lead to policies becoming more incrementalist and less radical across the board. I would be concerned about it giving more de facto power to the press though.
It's not just a matter of voting in a new government, we need some serious structural reforms to how politics works with an emphasis on subsidiarity making it very hard for a single entity to consolidate power and we also need severe taboos on things like building surveillance infrastructure. We need governments that assume some percentage of every electoral intake will be corrupt or self-interested and correct for this accordingly rather than assuming all politicians are honourable by default. Political power should be treated like enriched uranium: a vital resource for society that's nonetheless extremely dangerous if it's allowed to reach a critical mass.