From the comments, on lotteries and education

States don’t use lottery proceeds to *increase* funding to schools. They tie the lottery to education as a marketing gimmick, both to sell it to the voters initially, and then to deflect criticism (what do you mean you don’t like the lottery — are you anti-education?) See http://goo.gl/f5b55R

We’re told we need lotteries because people would gamble anyway, and yet a large fraction of lottery revenues go toward advertising, presumably so that people don’t lose interest in it.

I also liked the remarks from ant1900:

This (http://en.wikipedia.org/wiki/Racino) suggests that the appeal of racinos is being able to bring in slot machines to an existing race track. After reading only a few pages of ‘Addiction by Design’ I can see why. The smart machines are now subsidizing the humans and the horses. The horses are probably the hook that convinces voters to allow horse tracks to expand into slot machines (‘we have had the hose track for many years and that has worked out ok, and they are already regulated and already in the gambling business, so let’s let them expand into slot machines, which is not a huge leap from betting on horses’).