You would be amazed at the number of lottery winnings that go unclaimed albeit when the sum is over 87 million it is, shall we say, a tad unusual.
I would guess in most cases the people lost the ticket or maybe misread it and threw it away, etc.
Then of course, they may be in the process of getting rid of a Spouse with whom they'd have to share it if they cashed it in before the divorce was completed.
All the above reasons notwithstanding, if someone has the winning ticket and knows it and has yet to claim that kind of money, then by gosh and by gorrah, they're too stupid to be allowed to collect!
Seriously though, you are going to think what I'm about to relate is aphocryphal but it isn't because I know the couple this happened to and I could prove it if I had to. A couple of decades ago, there lived in a Brooklyn apartment an Italian couple who were in their upper sixties. Once a week, the husband would collect from elderly neighbors and family the money and the numbers desired by the purchaser and go down and purchase the lottery tickets at the corner candy store. This of course included his wife who never stayed with the same numbers, choosing different ones each week. This went on like clockwork for years.
Without fail the couple would watch the drawing on Saturday night on TV. One Saturday, the wife was watching with her numbers that she had given her husband written on a pad in her hand. The numbers were read and she had won over four million dollars! She started screaming and jumping up and down and said to the husband, "Let me see my ticket!" He went into his pocket and.................he had neglected, for whatever reason, to purchase one ticket. It had never happened before.
As it turned out, there was no winner that weekend and had that ticket been purchased she would have been the sole winner. Believe it or not, there was no homicide that night.
BUT, the man, who was an irascible person if ever there were one, brushed it off. Had I acted like he did I'd be pushing up Daisies right now and my wife would have been made familiar with life in a penal institution.
My wife, about two months after the event remarked to the Italian man's wife, "How are you able to wake up next to him every morning, especially with his attitude and the way he always talks down to you?" She replied that things like that just happened in life. We all (including their own son) were amazed she took it so well.
About a year and a half later, the codger was only getting worse when it came to being nasty. Around that time we happened to be visiting when his wife turned to mine and asked, "Do you remember that question you asked me shortly after he forgot to buy the lottery ticket?" Fran replied that she did. The woman then said, "It get's harder every morning....e-v-e-r-y morning!"