Defibrillators literally kill people after which you can manually revive them because their ventricular fibrillation is stopped. Maybe the metaphor is still fitting but I'm not sure you were going for it...
A vfib patient is already dead, or on their way there. The heart has lost all rhythm, isn't effectively circulating blood (though it's expending energy like mad), and in a few minutes, further classifications of clinical death (brain death, organ death, cell death) will inevitably follow.
What a defibrillator does is stop an invariably fatal loss or order, and allow the heart's normal rhythm to be reasserted. That may happen spontaneously or via further artificial stimulation.
Vfib itself is described as "an electrical disorder of the heart", which is what distinguishes itself from other forms of cardiac insult, most especially a coronary infarction, which is a physical blockage of blood supply, generally from accumulated plaque, blood clots, or both.
The analogoue to financial systems is at best imprecise, but what a financial stimulus shock such as the apocryphal "helicoptor drops" does is to provide free cash (spending credits) to a large fraction of the population in a case where spending has dried up. The idea being that the availability of money will get economic activity flowing again. In a case where normal activity has stopped, it's at least a fair analogy -- a one-time widespread cash shock which may start flows moving again.
The key point being that complex interactive systems operate on an ordered dynamic state. The heart needs to contract and relax, with a regular rhythm. The economy needs payments, receipts, and wages, exchanged on a regular basis. Stopping, blocking, or disrupting the regular flows is what's fatal.
Defibrillation isn't killing the patient. It's restoring regularity.