In each recognized jurisdiction, typically either a country or a state or territory (within a federation), a national lottery is given an exclusive license to operate lotteries. In return for this exclusive license, the lottery must operate its business of offering fun and entertaining games to the public under strict regulation, exercising responsibility with respect to minors and vulnerable groups, and returning all or most of the profit generated from its games to society. In this way, state lotteries constitute a sustainable source of income for the public good.
In practice, the lottery business model ensures that there is a direct correlation between playing the games of your local state-regulated lottery and supporting your community. Every time you play, your community wins.