Some very simplified answers: - Everyone would hire more seniors if possible. Juniors are sometimes seen as expensive and hiring only juniors does not scale.

Some very simplified answers: - Everyone would hire more seniors if possible. Juniors are sometimes seen as expensive and hiring only juniors does not scale. - Education systems do not produce senior people. Also there are other sectors than tech too. I don't know the current situation, but it used to be that places for IT education were never filled completely. There just isn't enough people. - I don't remember this being reported as significant - I believe there is difficulties with taxation etc. if you hire people living in different country.