Batman Gambit:
A plan that revolves entirely around people doing exactly what you'd expect them to do. This trope relies heavily on Flaw Exploitation manipulating, although it can work with virtues instead of "flaws" just as easily. Sometimes the flaw is that the villains are so predictable that they'll take the first chance they have to do something mean and underhanded.
The entire flaw of the entire establishment is they have never been powerfully challenged. We have been trying to get power since 1896. We have got to do whatever we have to do to keep it. Even the unthinkable.