In a real and ideal situation, those who criticize government are suppose to be those allowed to show what they have to offer because it may seem that they have better idea. I said ideal because assuming the system is not corrupt, so that they can genuinely offer something positive to growth of the country but the problem is when such person get into power or government and meet bad system, they eat their words and start doing same thing that they have criticized or they are frustrated out of the system by those who are feeding from the corrupt system.
Even though the government already has a strong system, there are still errors and fraud, this is where the activists and the community come to criticize it, because without criticizing sometimes the government has unknowingly made rules that are not pro-people. actually the criticism is to develop in a better direction, what the community feels is not comparable to the rules made by the government sometimes. even demonstrations are also important and regulated in world law