What made the 3rd Reich work is that is was a well oiled machine. Everyone followed their command and made it happen. It worked like one big brain, and rarely was there objection. Add in Hitler immense charisma as a politician and speaker, and it was the icing on the cake to make it all so.
This is one of the biggest misconceptions that people have about Nazi Germany. The wave of nationalism and German work ethic made for relatively smooth running on the lower levels, but in the top of the party it was utter chaos really.
Hitler delegated. To the people around him. If Hitler liked you, that equalled to power in the Third Reich. All of the people surrounding Hitler were there for their own reasons. Many of them didn't like each other. They competed with each other, with their organizations, their little private armies. It was petty bickering for Hitler's favour.
The first clear sign of this was the night of the long knives in 1933. Himmler and his elite clique of SS (which was just a small division of the SA at the time) convinced Hitler that the SA leader, Ernst Rohm, was out to make a bid for power himself. So they killed him.
Well-oiled machine? Hell no. Around 1944 Martin Bormann, Hitler's personal aide, was the only gate through which one can speak to Hitler. If Bormann didn't like you, you didn't get the chance to get in Hitler's favour. Bormann shielded Hitler to an insane degree. He did that to protect his own little power bubble.
Goering was there purely for his own gain. He was a decadant fatass, bathing in luxury, robbing art from all over Europe for his own galleries.
Goebbels was one of the more convinced Nazi's, while Himmler was a clerk. A timid clerk with total power over the police and the camps who would organize the murder of millions of people. Bormann was utterly loyal to the Fuhrer and made it so that Hitler couldn't do without him at some point, which obviously increased his own power immensely. Hess, Rosenberg, Ribbentrop, Speer, all these people in Hitler's immediate circle had their own reasons for being there. And for the most of them it wasn't blind dedication to the smooth running of the Third Reich. It was a lot for their own gain. They often actively worked *against* each other. Efficient? Fuck no.
Not to mention the creation of parallel organizations. The German state of course had the army, a police force, a secret service. The Nazi party eventually created the same organizations for themselves, effectively creating double agencies (Waffen-SS, SS, Gestapo - Wehrmacht, police, SD) to the existing ones.
Because that's how the Nazi leaders could enhance their own power sphere. But was it efficient? Of course not.
One of the greatest wonders of the WW2 for me is how that colourful collection of characters around Hitler in the top of the Nazi party functioned. It most reminds me of a medieval situation in which there is one undisputed King and all his vassals are busy competing with each other for the Kings favour. Waging war, making peace, creating and breaking alliances with each other.
Nazi lawyer and party official Hans Frank said during the Nuremberg trials that it most resembled an "anarchy of the all-powerful". Under Hitler, there was a constant guerilla for power.
It's a really interesting subject.