Imagine a hypothetical country where small groups of unelected individuals can make law by simply sitting around a conference table deciding they want a new law, even if that law violates the constitution. Those unelected representatives could only be dismissed by the executive power and could essentially do whatever they wanted. Furthermore, imagine if the citizens of that country were not allowed to contest these decisions in court because they didn't have "standing" to do so.
Furthermore, imagine at least one of these agencies would be empowered to go seize the property and businesses of the citizenry without any possibility of outside judicial review. In our hypothetical country, it wouldn't matter if there were an elected body, because the agencies and executives could do pretty much anything they wanted while letting the people have the illusion of electoral control.