I don't think that works. ABK acquisition is not analogous to increasing costs of essentials. MS aren't having to shell out $70 billion because their current expenses are increasing. If MS doesn't buy ABK, there's no clear, obvious impact to their operations in this difficult economic environment.
You'll have to convince me that MS spending $70 billion on ABK is as important to them as some household spending 20% more on groceries than they did this time last year because they've no choice but to spend that.