Most of the waste is Uranium which can be put back into reactors, the most dangerous long-lived element in the waste is Plutonium which is also a good nuclear fuel.

Remove those elements plus the higher actinides (Neptunium, Americium, Curium, ...) and almost all of the radioactivity in the fission products has decayed by 500 years... It's less radioactive at that point than the Uranium ore was when it was mined.

Burying the fuel rods was a half-baked idea that was come up with in a hurry in the 1970s because of racist fears that brown people would learn to reprocess nuclear fuel and develop nuclear weapons. Now we are facing the certain danger of getting fried by global warming as opposed to a hypothetical threat of nuclear war.