Well, hypothetically, if the government on average does more good than harm why would you not want that? Sure you'd get Hitler-lite on occasion, but that would be balanced out by anti-Hitler-lite doing good.

Of course, the damage the bad apples do far outweighs the benefits of the good so that argument doesn't hold. A century of good governance with global assistance barely balanced out the damage Hitler triggered in 5 years. Destruction is easy and creation is hard. And that plays out on the small scale too with small numbers of corrupt officials undoing huge amounts of work by good people.

If we had perfect information, we'd find that the spying apparatus of the 5 Eyes has done far more bad than good to the general welfare. The political corruption that must be causing is immense, we already know that every president since Obama has been targeted by the intelligence apparatus in some form. It is unlikely it ends there.

I'm less sure about the situation in the UK, but they generally follow the US trend.