Yes, they were idiots. Trade does help, true. But you can agree to free trade and free movment of people WITHOUT things like common currency and sharing of debt

Yes, they were idiots. Trade does help, true. But you can agree to free trade and free movment of people WITHOUT things like common currency and sharing of debt. These things cause problems, and many people have pointed this out. There are different visions of the EU, some wanted it to be a free-trade zone others want 'United State of Europe'.