I wrote about this.

You cannot get good fruit from a corrupt tree.
Anyone at the level of national elections is already corrupt to the core. If they are not, they are not allowed in the elections.

Corrupt people keep a corrupt state in power.

However, this is going to change. The entire lock on the system that you have described is going to come crashing down. Psychopaths are going to be seen for what they are. People are going to start voting for the most caring person. And not just seemingly caring, but truly compassionate.

This, along with reforms that just seem... obvious, will slowly change the system over time. (well, as fast as human perceptions can change.)

The baby-boomer generation cannot imagine a world without war. We have to beat the commies.

This generations is seeing, we have to fight the boogyman... (and the boogyman is US)

The next generation will see that war is a racket. War is stupid. If someone needs something lets work together to get it. Then, there is more, more for everyone. In cooperation, 1 + 1 = 4. In war 1 + 1 = 0. 4 is much greater than 0.

The generation after that will be like, "how shtupid did they have to be to go to war?" Didn't any of them have any reasoning skills? negotiation skills? Bueller? Bueller?