I will make a little progress first.

It is particularly concerning that the vast Majority who have come to Britain in the last few years, including many of those on the skilled worker route, are unlikely to contribute more in tax than they cost over their lifetimes through their use of public services and state support. As things stand, the lifetime cost of the recent wave of migration is set to be hundreds of billions of pounds. It is one of the biggest scandals in British politics and most people, including the Prime Minister, now acknowledge that the accelerated migration of the last few years was a profound mistake. When we make a mistake and have the power to reverse it, it is right that we do so. We absolutely have the power to reverse this particular mistake, and that would start by changing the rules on indefinite leave to remain.

At the moment, after just five years, most migrants can claim ILR, allowing them to stay here indefinitely, access state support and begin the path to citizenship. My Shadow Home Office colleagues and I have repeatedly argued that the qualifying period should be extended from five years to 10, but that alone is not enough. No new visa should be issued to, no new ILR status should be granted to, and existing ILR status should be revoked from, those who have committed a crime, accessed state support, or are unlikely to contribute more than they cost. Those who have no legal way to stay here would then need to leave. That is how immigration works.

Many hon. Members in this debate have commented on the fairness and perceived fairness of retrospective rule changes to those who have come here. That point was made in opening by the hon. Member for South Norfolk and by too many other hon. Members to list. We can feel great personal sympathy for such people, but our primary, indeed our only, fundamental responsibility is not fairness to foreign nationals but fairness to the British people. It is our sacred duty to put them first, and to act in their interests and their interests alone.