Financial resources, mostly. The EU is still one of the richest regions in the world, the emphasis being on 'still' here. If they don't act now and if they don't act decisively, the EU will be economic backwater in a few years.
If you mean Euro balances - that is worth nothing in the context of what Europe can produce. If state currency could be converted to production capabilities, countries could just print money to increase production.
They just decided to use those resources for the wrong purposes. Again, it's as simple as that.