Power make people ( even the good ones) evil..
what do i mean with it =
an honest guy can be corrupted by the power... once a person taste the power , it will transform this person to abuser , haughtiness , invisibility , with or without knowing this self ...
Power corrupts. Absolute power corrupts absolutely, or something like that goes the saying. And its very true.
Unchecked, give someone power and he/she will start abusing it, even if it starts with the best of intentions, it ends in the worst. It has to me limited, in time and extent. The three branches were split for this reason, give two of these to the same person or group, and the trouble starts. They simply overwhelm everything the rule becomes theirs, no matter what. And no one can question them, or else...
And you will notice this in the worst countries. It is true that split powers often limits the speed where changes for good could be made, but the price to make is too great, so this shortcut may end becoming your destruction.
As much as you hate "the system", make sure your proposed changes don't take these shortcuts. But of course you will also want to avoid falling in redtape bureaucracy nightmare that lets nothing be done either.