When we do a fiscal sustainability report, that is driven to a great extent by demographic factors. Certainly an increase in immigration would increase the labour force over time and would help in that sense. It would help in terms of the overall economic growth.
We have done simulations. I don't have those in front of me right now, but we have done simulations for our fiscal sustainability report in terms of how big that impact is. From what I remember, the impact of raising immigration by a reasonable amount on the overall fiscal sustainability is not going to be very significant.
Whether or not you increase immigration, there are many other reasons for doing that, which we are not really taking into account and we can't really comment on.