[BrandonM]

Problem not solved. A savvy attendant just checks the tickets on the end of each roll. If it's a winner, go ahead and buy it. Otherwise, wait until a customer buys the loser first.

[Luyt]

Disallow attendants to buy tickets while they're on the job. [However, they could signal accomplices to buy it for them. It would take a team, then.]

[rtghnyhjm]

Most lottery tickets are sold from small convenience stores, either family owned or with just a couple of staff - hard to enforce this.

There is a crackdown on relatives of store owners winning the lottery - but is normally them defrauding winners who come in to check the ticket.