You need to answer that one before concluding that customers' experience would improve.
So no, I don't need to answer that beyond any number greater than there are now, which I already did.
Or let's make it 3-fold and claim the other hundred grand is for training and office space (yeah, can't get a CSR to work remotely and definitely can't earn less than minimum wage nor those jobs be abroad because I'm building an unrealistic quibble).
It's like people arguing that you can't know the sky is still blue on Earth because you haven't been outside yet today. Please. Worse than that, it again obscures the real questions - what level of CS does Google need to provide to stop customers going to a competitor, which is the level they have now, and hence, since they're too powerful to be competed with what should be done about it? What can be done about it?
It would go up, probably quite a bit, and the profit would re-emerge but at a lower level per employee.
The real problem is that their scale (in terms of reach, money, customers, political leverage - you name it) is so large that a company could compete or out-compete on customer service and still wouldn't win a significant chunk of their business. That's why they don't need to hire more CSRs.