Why? I suppose that's nearly a look always the case, but... Why?
We seem to be a species that gravitates toward hierarchies. We always have.
Well, I think we are designed that way. But, that nature has been corrupted and is being put to nefarious uses through government. I would see us break the yoke of that corruption and seek our true nature.
Sadly, our true nature (for humanity as a whole, not small number of outliers) appears to be repeat bouts of willing servitude.