The lottery is like insurance - the expected value of your return doesn't justify the cost. But instead of paying a small premium to prevent catastrophic events, you are paying a really small one for an unlikely but extremely large gain. Of course, once the premiums become a disproportionate amount of your income, you need to reconsider your priorities.
And, no, I didn't win, though a winning ticket was sold just a few miles from here, so don't ask for anything.