Given the choice, Amazon would rather spend 100% of its profits on itself than allow any of its profits to be paid out in taxes. Section 174 was implemented without a minimum tax on corporate profits before voluntary deductions such as research. Therefore, it’s exploitable and all companies ought to hire and fire staff to ensure their profits show as 0%.
This tax code defect is now closed by accident, but could have been done much more intelligently than it was. Oh well.
(EDIT: My first sentence is potentially confusing when I reread it later. To restate: section 174 was defective as implemented due to the uncapped 100% deduction, but the concept of a significant research exemption is still excellent. Just need to close the effective 0% corporate tax rate loophole.)