Well, Hitler could have learned something about this from Bobby Lee. There's a very interesting page at Wikipedia that breaks down the arms production and compares production by the Axis powers to that of the Allies. It gives you information like this:
|Click to enbiggify|
It doesn't matter if you have better tanks when you're out produced 4.5:1. And arguably, the T-34 was the best tank of the war, especially in its up-gunned 85mm version. Reading this list is astounding, and makes you wonder what Adolf was thinking, because it sure wasn't about the material.
Detailed reading if you, like me, are a nerd.