Managers served a purpose in an age when information had to be delivered up and down the corporate hierarchy by actual people and you were dealing with employees doing a job that they weren’t sure how they’re job fit into the overall company strategy. 

Make the company transparent and turn employees into leaders and you don’t need the dead weight of management. 

I totally disagree with this premise. If you have to micromanage then you have systemic problems in your organization. That’s not to say leaders shouldn’t be involved. In fact I think the best leaders do get heavily involved in the pieces of the business that matter the most. Steve Jobs was heavily involved in product design but only at certain points of the process. He didn’t micromanage the whole thing. 

It’s about knowing what the most important parts of your business are and making sure you’re there to direct the right course of action.