If Larry is approving hires it's just as a rubber stamp. There's no way anyone at the head of a company that size could think about anything at the employee level.
At Google, hires had to be approved by the founders as of 2013. This was when the company was hiring a few hundred people per week, so the founders got a spreadsheet with links or something like that. And apparently they did sometimes say no to some people.
It seems like a bonkers practice to me. I understand that it is important to hire good people. But this could be delegated several levels down, at least for entry-level hires. I suppose the top dogs could worry about promotions and hirings starting at the level of the junior managers, if they wanted to.
For the longest time, APMs had to have a phone screen with Marissa Mayer before they got hired. My main question when she asked me if I had any questions was whether this was the best use of her time. I don't know if that had any influence or not over their decision.
No kidding. We were a 500 person shop that was gobbled up by Oracle. First meeting with Larry - we were all suited out. Walk in, he is in jeans and a teeshirt. He asked, 'why you all dressed up?' A very, very technical discussion on our company's software. He had been thoroughly briefed on our stuff and asked very insightful questions on how our J2SE app worked.