If we look at the history some countries got maximum development in Dictator ship while some got maximum development in democratic government. Every system has it's own flaws and benefits. What do you like ? if we talk about the welfare of general people.
It's about the motive of the ruler.
And Dictatorship or democracy is just a disguise.
No one can run a country without popular support from its citizens.
The parliamentary democratic system is so corrupt that no good person can rise to the top.
This is a quite accurate answer.
We could add that dictatorships usually are more efficient in the beginning, when the dictator has come to power due to the support from his people, and far less efficient years or decades later when his mind is not very lucid any more but he still has a strong grip on power.