How do you waste money? By burning it, throwing it in the bin?
Isn't the goal in a capitalist system to spend that money?
Also, several GMI studies have proven your statement to not be true. It is not a significant non-majority of the population that do this.
Setting aside how often people actually do it, it's clearly possible to waste both money and value. You can buy lottery tickets, or you can buy things you don't need.
Buying lottery tickets with UBI money is just returning the money to the government and/or some other lucky individual. Only an insignificant amount of marginal wasted work is performed.
TBF: many state lotteries are operated by franchises which may be engaged in fraud and/or abuse, or simply skimming a large share of the take.
Texas, notably, recently:
"The Texas Lottery Is Accused Of Fraud, With Calls For It To Be Shut Down"
The Texas Lottery is under fire once again, after Lt. Governor Dan Patrick paid a visit to a store in Austin, where an $83 million dollar winning ticket was sold. Upon arrival, Patrick discovered a warehouse of lottery ticket printing machines, run by a ticket reseller....
Lotteries also manifestly fail in their often-posited goal of funding beneficial services such as education. In reality they shift tax burden from the wealthy (who know better than to play) to the poor (who are desperate even against very poor odds), and cut overall educational funding. See:
"The Big Lie: Gambling and Education Funding" (2012)
“Don’t insult me with those ridiculous claims like “the money is for education!” Money is fungible, and education is already a high-priority budget item. Money raised from slot machines and earmarked for education is simply money that would otherwise have been diverted from some other budget item. The disingenuousness of this claim is jaw-dropping, and it’s even more appalling to me how many people fall for and parrot it.”
Then it's not a waste of money. That is the beauty of money, everyone see fit how it is useful to them, while holding the same value (currency) for all.
What I do with my 1 EUR has value to me, and might be a waste to you. You might be spending that 1 EUR on a keychain that looks good to you. Personally, that's a waste of money, but not to you.
Are you making this point because you believe that UBI/GMI is not earned, and therefore someone else had to dictate how to be use? Like food stamps?