I don't think most people trust their bosses, or HR, and for a good reason. For example: https://news.ycombinator.com/item?id=15018007

And I think yes, larger hierarchical (actually, authoritarian would be a better word - you can have hierarchy with democracy too) organizations are inefficient, so in a sense, they have already fallen apart.

I think trust implies choice in some sense, and if you don't have a choice, then trust is meaningless.