My Lords, like my noble friend Lord Hunt, I enjoyed last Thursday's debate in this House. In addition to the points of detail that were raised in the debate, I particularly enjoyed the number of decent, humane contributions that enlightened the public debate in the UK on this most sensitive of issues. For far too long, far too many have displayed a willingness to direct their thinking and comment on migration in a way that reinforces fear and intolerance, rather than challenges it. When confronted with difficult issues that may risk popular opinion, politicians and legislators are faced with a choice. On an issue as sensitive as this, which goes to the core of how individuals relate to each other, the choice that we make is particularly important.

On such sensitive issues, our starting point has to be what is right. Discussion on how to win public support for a position should follow decisions on what is best for the country. Unfortunately, on migration, too much decision-making follows the reverse course, with policy based on what will appeal, what will most easily win votes and what will be politically acceptable within political parties. As a result, policy decisions damage Britain and are regularly unsustainable. Not only do I believe that hostility to cultural diversity is morally wrong and unnecessarily intolerant, I am also convinced that culturally diverse societies are more likely to be entrepreneurial, more likely to succeed and more likely to grow and prosper in the modern world. The evidence tells us that, increasingly, they do.

The Government's approach of an arbitrary cap, cloaked in, frankly, the language of intolerance, reinforces and entrenches the problems in this debate. It contradicts the Prime Minister's admirable signal of "open for business", since "not open for talent and hard work" is a poor sub-heading for that slogan. It views new people as a burden, rather than an asset. It legitimises intolerance and ignores the innovative and positive approach to the regionalisation of immigration policy, as advocated by the Liberal Democrats before the last General Election. Despite dire warnings, we made a success of such a policy in Scotland. It would be a tragedy if it was never repeated and its positive lessons lost.

In 2002 I began a positive campaign for in-migration of fresh talent to help reverse Scotland's history of emigration and resultant depopulation. Population decline was the greatest threat to our future prosperity. We set about attracting people to reverse that decline. For five years Scotland's population has risen. Our society is more diverse and we benefit from the work rate, talents and enterprise that the new people have brought to our shores. The fresh talent visa scheme, the welcoming of new people into communities, the celebration of diversity by leaders and the challenging of prejudice have left us stronger, more successful, just as stable and with fewer racial tensions than we had a decade ago. Therefore, I hope that the new Government do not feel obliged to stick to a rigid and damaging approach, that my party in Opposition regains its confidence on this issue and that the Liberal Democrats do not forget in government what they advocated just six months ago in opposition.

If all parties-and I mean all-were to resolve that Britain is best when we are open, tolerant, inclusive and, yes, diverse, we would be a far richer society in the years to come.