Strong EU federation is the only hope Europe have. Every single country is nothing alone compared to strong India, USA and China. Together can compete. EU need to develop space and military program together. All hi tech technology. No use that every country research its own battle tank or fighter jet. No use if every European country send a spaceship to mars. Together we can!
I disagree with this view, competitions make countries specialized and become efficient. What you need is a free-market where goods and services can be traded with minimum restrictions. No need to create a government on top of legitimately elected governments, telling them to do stuff, etc.
Indeed (IMO) the European Union is a failed project and we should learn about this as a centralization vs decentralization case study.