Illogical

"You cannot stop illegal immigration."
Thus the justification by a prominent Liberal Democrat supporter for her party's policy to have an amnesty for people who are in the UK illegally. (BBC Radio 2 Jeremy Vine Show, today.)
But you need not have a policy that encourages it. You can try to discourage it and prevent it.
There is no need to give greater consideration to those who break the law than those who abide by it. Which is what an amnesty means.
Besides, it contravenes one of the three pillars of the European Union - which are democracy, human rights and the rule of law. If one pillar goes, the other two are worthless.