The state lottery systems here in the US are basically playing on the illusions of the poor. The winnings themselves are taxed a very high rate (some states as high as 40%). Secondly, there is a statistically improbability that you will eve win the amount of money you put in gambling. Third, it's mostly poor people who give away their hard-earned money playing this scam.
In many states the lottery has proven beneficial to not only the revenues of the state but how much money they can generate for the states school systems. In all cases gambling addiction hotline numbers are readily available to anyone who thinks they may have an issue with their gambling. Ive lived in many states with lotteries and I can honestly say they are doing quite well.