That could be fixed in 1 day if the CEO simply said hire people to maintain this stuff, and don't require them to get promoted. Google's a mega corp now, not a startup.
And they pay white well at entry level. Most people don't care about promo unless forced (up or out).
You grossly underestimate how long it takes to change the culture of a company, let alone one the size of Google. A CEO can’t snap his/her fingers and direct a change of this kind into existence.