We only don't have it because we refuse to collect it. There is enough wealth in the world to end hunger, poverty and allow people to age to death in dignity, but we lack the political will to achieve any of these things.
US federal government alone spends trillions of dollars on wealth transfers from workers to non workers via Social Security, Medicare, and Medicaid, along with a few other program. And even that doesn’t guarantee you will be able to see a doctor in a timely manner.
And no, even if you skin all the rich and put all their money to UBI, it will only last a year or two (you can take Excel and calculate). The bulk of income and taxes comes from the middle class.
Real estate in particular (but there are others) is a bottomless pit that society dumps money into, and speculators scoop money out of.
