There is one thing that bugs me on these arguments about production numbers during WW2. And it goes back to discussions here with Lord Baal and others (whatever happened to them?): why do people keep talking about finance and bankruptcy?
You seem to be applying a contemporary, or a least a peacetime, idea of economic limitations which was not necessarily applicable to a total war situation such as WW2. Especially to Germany, but also to the UK which effectively shifted its economy to a 'war economy', I could argue that the 'free market' was suspended for the duration of the war!. Even the US did that to a large extent (Galbraith and others wrote extensively about their experience managing it).
Internal finance is not a limit on economic activity for any sovereign polity. Availability of resources (labour, raw materials, capital as equipment and knowledge) is what sets limits on national economies. Finance imposes a hard limit only on international trade. This is not to say that a government won't cripple a country at war despite having the resources available, by misusing or not using them based on arbitrary internal financial limitations. It's not even so absurd, because politics and finance are intertwined and to mobilize towards a war economy can cause the toppling of a government... but in a total war situation such as WW2 every participant eventually went on to act like finances be damned!
The UK was limited by its capacity to import raw materials, even if it had those available elsewhere on its empire. It was also limited by finance on its trade with the US and other neutrals. They could have the shipyards and factories, but without the raw materials those were useless. I think we all agree on this.
Germany likewise was limited by availability of resources. That they were running deficits but pillaging the nations they occupied was not a problem: they could keep doing it and indeed kept doing it for years after 1941. They could shift production from consumer goods to the war industry imposing more hardship on their own people and indeed went on to do it later during the war. The thing to being a totalitarian state was that they could do it. They could keep paying the soviets with looted gold and property for many years more, if they so wished. They didn't, but had reasons other than finances for that.
IMHO operation Barbarossa was carried out asap because the soviets were building up their own army even faster than the germans, not because Germany was hopelessly bankrupt as of 1941.
And the UK went on to be on the winning side because the US chose to support them and threw its own massive resources into the equation, not because the UK had greater economic potential than Germany, either on an imaginary one-on-one or with both draining their empires.