From an OOC standpoint, I started off with the basic statement that 1 ISK in Origin has about the same buying power as 1 american dollar irl. I did this not for any lore reasons, and just because it simplified things when I was roleplaying in Origin in the past.
However, this cannot make sense entirely, because there's just no way that everything is that inflated, and the fact that it isn't a 1:1 ratio becomes more and more apparent as you get larger quantities of ISK. A new car in the real world might cost 35,000 dollars, but there's no way its going to cost 35,000 ISK, even in Origin the inflation doesn't get that bad. It would be more like 3,500 ISK, so somewhere between those two values, the ratio becomes skewed by an order of magnitude.
This sort of makes sense to me anyway, because of the import and shipping bottleneck that Juno represents.