The Economist (UK) magazine has a study of the consequences of more older people and fewer younger people. Here is a synopsis, and there is also a link to the Economist study.
Demography is Destiny: a MercatorNet blog about the social fallout of demographic change.
If you want a short, sharp introduction to the topic of global ageing, the latest issue of The Economist is just the ticket. It covers the demography and economics of ageing (in the developed world) and concludes that "the consequences will be scary". Finally the message is beginning to sink in. You can download a PDF if you sign up for a free account.It's worth it.
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