Legislators across both aisles have demonstrated they have no interest in decreasing spending. This bill forces their hand while there's still leverage.
(edited for typo)
And any increases were across the board. Asking them to cut all of the increases from only ~10% of the expenditures is ludicrous.
And how would you determine if it is too low?
For example would the calculation consider the current population? the current factory capacity? Agricultural capacity? the year? Interest Rates? Tax Revenue? The populations desired rate of saving? The current desires and goals of the nation and its citizens? If there is no exact formula, then would a representative body that debates and agrees on a best estimate number be a reasonable way to decide that? If so isn't that what congress does already?
[0] Unless you count forcing the treasury department to take extraordinary measures, which has happened several times; and has been going on since January.