Could a Lottery Be the Answer to America’s Poor Savings Rate? (Freakonomics)
freakonomics.blogs.nytimes.com
freakonomics.blogs.nytimes.com
Also, if you deposit more money do you increase your odds or payout, or does it work on a regular deposit schedule? Otherwise there isn't much incentive to keep saving. Can you just withdraw and redeposit the same amount each week to keep entering with the same amount?
I think the best way to increase the savings rate is to stop artificially underpricing money and creating inflation. I don't save cash because I know the government is working against it. And I'm not poor or stupid.
http://en.wikipedia.org/wiki/Premium_Bond
The stuff about ERNIE is interesting, too.