Simple management rules bredren. As someone who works in management im responsible for anything my employees do. Yes, I can fire them(or get them fired by HR). But I always have to sit down with my boss and explain **** that I did or didn't even do. That's just the nature of the beast.
As the head guy, I hired the person, I'm responsible for their development or lack thereof so I have to speak to it and have to own the outcome of their actions.
If i keep hiring people who are not doing their jobs correctly then I'll justifiably be terminated because my vetting process and my leadership skills are obviously lacking.
Like, I don't get all these excuses for Mario, man. He hires guys that dont get the job done and somehow it's not his fault? I don't know a world that works in.
It's as simple as: He hired the guy, if he sucks it's his fault for hiring him. He would surely get the praise if the guy is successful so let's keep it fair on both sides.