This is all TK's doing. While at Oracle he was very outspoken about how it was the sales organization's fault that product wasn't selling. From the moment he walked into Google, he carried this belief with him and thought that the reason why Google Cloud wasn't growing faster was because of sales. They were simply too comfortable as they could fall back on their base salaries and Google stock allocations and THAT is the reason why Google wasn't overtaking AWS or Azure. Months ago, he cancelled the announcement of what quotas were going to be in the second half of the year and started planning how he wanted to "incent" the field.
Interestingly, he also revised the hiring process to make it easier to get people in the door. Then his Oracle cronies started showing up. Then it was announced that the best accounts would likely be given to yet-to-be-hired staff with specific experienced that parallels the Oracle, Microsoft, SAP and IBM models and that these positions would be paid at higher, newly created pay grades. Existing employees were told that they ikely didn't have the skills needed to continue to handle these accounts, but they could try to interview for the position and that if they were successful they might not get the promotion or raise. Everyone else is expected to invest time in interviewing and then training the newly hired on these top accounts.
Is it coincidence the global head of sales operations and the VP of sales in the Americas left before this announcement was made? I think not. Will others leave over TK's treatment of the sales organization? Absolutely. The question is just when and how many.