Your second sentence has got it. Your third is nonsense - it is solely because of the right of free movement that they get away with it - even Jeremy Corbyn twigged that.

Oh dear 👨🏻‍🎓 I must be really getting to you - told you about that "tell" of yours before. Fact is 👨🏻‍🎓you've never worked in the real world one day in your life - let's face it you got paid for attendance only - hmmmm gold plated final salary pension too that the tax payer has to subsidise. What a poor return for their money.