Those who originally designed the EU had visions of a “United States of Europe.” Yet the USA they wish to copy does not require every state to agree on everything. Can you imagine if we had to do so? Would Texas and Vermont ever find common ground? Florida and Montana? Hawaii and Mississippi? Of course not. The idea is absurd. Our government would have collapsed long ago if unanimity were the requirement.
We can amend our Constitution if 75% of the states agree. An amendment to the Maastricht Treaty, which is the organizing document for the EU, requires agreement by all 23 members.
The US has survived because we have a system of majority rule with minority rights. We require supermajorities for certain big decisions such as Constitutional amendments. We do not demand that every state agree to every major decision, because it would never happen. Paralysis would be the result – as Europe is now proving.