Unelected officials in Brussels imagined their vassal states would simply comply when they presented the fait-accompli of quotas to distribute 160,000 migrants last year. However, EU states, and those of the Visegrad group in particular, made it clear they weren't playing; under existing rules, they said, it was up to national governments to decide who qualified as an asylum seeker, what the process was and how long it took.
This was a major spanner in the EU's works. How could they implement the 'Frontex' bureaucracy when each nation had different rules? And how could they impose quotas on sovereign nations unless they had the sanction of laws and fines to threaten and beat down national objections? Why, Luxembourg could classify Eritreans as asylum seekers only for the Czech Republic to declare Eritrea a safe country.
Hence today's proposals for the EU to take authority over all asylum disposals in the Schengen region. No longer could Hungary refuse to take (the unelected) JC Juncker's quota. No longer could Poland classify nations as 'safe' when Herr Juncker had declared them unsafe. Refusal would now mean swingeing fines and suspension of EU aid funds.
And even though the UK isn't in Shengen, so long as we recognise the ECHR we will effectively be bound by Brussels rules on which countries are safe or not, and we will also be prevented from returning failed asylum seekers under UK law to any Shengen nation so long as we remain in the EU.
And as the unelected bureaucrats in Brussels generally don't launch a proposal they don't think they can win, we must be very afraid - and be clear that Herr Juncker's efforts to cow the eastern Europeans could well have consequences here.