Earlier quoted context omitted.
Breeder reactors reduce the waste by more than 95% and leave only isotopes that decay much faster.
In 2010 the International Panel on Fissile Materials said "After six decades and the expenditure of the equivalent of tens of billions of dollars, the promise of breeder reactors remains largely unfulfilled and efforts to commercialize them have been steadily cut back in most countries"
They apparently don't make economic sense since Uranium is cheap, and there is a risk of proliferation. It's not the case that the technology doesn't work.