So it really is just a way for them to suck out the cash flow of Aramco and leave nothing but a husk for external investors?
Sure, they could reduce government spending, or they could reduce the dividend, and reduce spending more, but in any case, the size of the dividend relative to cash flow or profits still says something about sustainability of the present course.
The KSA, after all, can't issue debt in its own currency, can it?
If you pay money "to yourself" for groceries, sure, you can always take it back, but you still have to feed your family.
Writing down that your budget for groceries is $0 (or less than whatever is needed) doesn't give you additional freedom.