Correct me if I'm wrong,
but Google checkout and Paypal are commercial services?
Provided they are not colluding in a cartel then they are free to price the service as they like, and their customers are free to choose whether to use it or not.
If the new fee level generates excessive profits then a new entrant (or existing player) will undercut them. If instead this is a commercially realistic price then customers have to conduct a cost benefit analysis on whether it is worth using the service.
Until a new entrant (or existing player) determines how to offer the service at lower cost to themselves, so with the ability to offer sustainably lower prices, or decides to buy a book of business before ramping charges up to a commercially sustainable level (which is what it sounds like Google has done here).
Sure, a recession is underway, but even in a recession Google has no obligation, moral or legal, to offer services at below cost just to be 'nice'.
I am neither an adwords nor google check out user, so have no emotional attachment to these services.