Our growth will be due to a shift to a much higher % of people in retirement, Japan now is where we will be in 20 years time1. ALL regions have a growth rate, none are expected to decline. Just because ours isn't as rapid as Asia's doesn't mean it still isn't going up (contrary to the claim I was replying to).
2. The increase in population in Asia also includes global migration which they predict will go up. With that part of the world inevitably become the richest in the future there will inevitably be a positive migration effect as proven by the diverse societies of current 1st world countries.
To offset the aging population in the UK will require immigration on a scale never seen before in the modern UK, tens of millions of people of working age will need to come here. Do you think this will go down well with the existing population given the social stress caused by a couple of million in the last 20years?