Well, currently the democratic government structure is the best form of government structure we have, it is not perfect, but it is the best we got, it is better then before, where we only have dictatorship government structure, where there were even more problem, where in the west for example it was been dominate by the sick and disgusting idea of "King is god's given right." and with evil dictators who deserve to go to hell, believing in this garbage and use their power as King abusively and people who also believe in this none sense and put up with those shit, in Asia where we did not believe in the "King is god's given right none sense" (instead we believe the Emperor is a servent of the gods.) we had much better Kings who work in public interest, but everyonce in a while we still get a corrupted king who use his power abusivley and a lot of people have to died to overthrow him/her.
So democratic government structure is not perfect, but it is the best we got, so far.
Although, I do admit that some country tend to benift more from a dictator or semi dictator government structure, but that would greatly depend on the merit of the dictator in charge, it would require for that dictator to be both good and wise enough, so even if it is good for that country in the short term, it is still not good for it in the long term.