>It's somehow disappointing that human race hasn't been able to come up with (or more precisely - hasn't evolved enough for) a better system.

A little off topic, but since it was bought up, I am going to mention that I have been thinking of a systems where members of Parliament or Congress are hired by a committee from the general public and then last for something like 20 years terms (unless he or she themselves resign of course). It would take advantage of the separation of powers spreading power out among different kinds of people, so it would not have the problems a dictatorship or monarchy have. It would also allow specialization.