Non action is a decision. In general, I don't think there is even a possibility to ever make less decisions. A situation happens, and a decision needs to be made to resolved it, non-action is also just one of the possible decision.
I don't think I have ever heard, study or read about the claim of democracy making better decision (at the least, the common refrain about tyranny of the majority comes to mind), so I will have to ask for justifications of that statement.
"Wisdom of the crowd" was also a common refrain for a time. Somewhat trendy in the years before Twitter and Facebook blew up. I think it's widely regarded as naive nowadays, though.
First, most people misunderstand democracy. Democracy is that people have a say over in proportion to how much a decision affects them. Command-control hierarchies don't have this property. I like to call democracy 'distributed' decision making vs centralized like command-control.
Have you read studies that command-control hierarchies make better decisions?
I don't think I have ever heard, study or read about the claim of democracy making better decision (at the least, the common refrain about tyranny of the majority comes to mind), so I will have to ask for justifications of that statement.