Germany exports about as much as the United States, with a quarter of it's population. At least in Germany there are going to be a few people with a genuine finacial interest in remaining in the EU and making even more money.
Airbus (which is an EU company) is selling more aircraft than Boeing. Their employees won't be welfare recipients either.
Cursitor Doom does seem to be remarkably stupid - not just about Brexit, but also about the European Union's financial situation.
The EU - as a whole - does seem to collect more of the national income in taxes than the US and invests more in keeping the less well-off fed, housed, educated and healthy. It seems to pay off.