"Its a bit strange that right now both our oil supply and monetary system are susceptible to a single calamity."

A global recession will cause demand to drop. Prices will drop and production will not increase. But the prices will not induce additional exploration and development.
I think eventually growing emerging markets will mop up the excess at low prices. For nations who are too deep in the credit crunch, they will see oil prices drop for a while and the prices rise as the productive nations mop up excess. The nations stuck in depression/recession will see inflation at the same time. What is a central banker to do in this situation?

I happen to doubt prices will drop that much if at all. What will drop is investment in the oil industry because of uncertainty about future prices plus OPEC will continue to pull back production especially KSA which would I'm sure be happy to have real reserve production if they have peaked.

We will see next year. But I'd be surprised if prices drop below 70 and expect them to stay in a 70-100 band between major events. The weakest post peak argument is that demand destruction will cause prices to drop. Since this means demand will drop under supply which does not make a lot of sense given a lot of pent up demand already exists for cheaper oil.

This is conventional wisdom but it assumes that a recession lowers production faster than production drops naturally. If production drops faster than consumption drops due to the recession, prices can actually increase during an economic downturn.

In short, you have limited yourself to thinking in terms of when oil was plentiful. It is less plentiful now and there may be consequences depending on if/when consumption intersects production declines.

"The greatest shortcoming of the human race is our inability to understand the exponential function." -- Dr. Albert Bartlett
Into the Grey Zone