You think Amazon could spend an extra $700 million to $1.4 billion with "basically no dent in the wallet"? I guess I understand why you're frustrated if you think that's the case, but it's just not true.
Jeff Bezos owns 55.55M shares of Amazon stock (https://www.secform4.com/insider-trading/1043298.htm). Since just April 1st, the value of that stock has increased by ~55.55M*($2400 - $1900) = $27.775B. I know net_worth != cash, but he can and routinely does (see link above) liquidate stock to fund other projects.
In this context, I think $700M is equivalent to a coin tossed in a fountain.
That's fair. This cashflow is obviously not available to Amazon directly, but I could see an argument that Jeff Bezos specifically ought to make more funds available. (Maybe he will - if you believe the headlines he was entirely hands-off the retail business until recently.)
And this is not an annualized number, they started the pay increase last month. This is a huge figure, especially for a their razor thin margin retail business.
In this context, I think $700M is equivalent to a coin tossed in a fountain.