Actually no, the lower the price of silver the more people are eligible to donate since the criteria to fall in that group is lower.
Despite the lower price of the silver, the "tax" is a static fiat-based % so basically more people are donating the same %. All the people that were donating 1.5% if holding a balance over $380 would still be donating it (and the same $amount) if the threshold were $360 (silver price drops), more people would be donating since now everyone between $360 and $380 would also be donating a 1.5% in addition.
If the donation was in silver then it might even itself out, but you'd have to look at a distribution curve of income to know for sure.
But if I understand correctly people donate when they don't have to pay tax.
From the twitter posts:
> Individuals who fall just below the threshold one year due the chance price of silver suddenly avoid a 2.5% gvt tax. Those people then increase their private donations to charity (since they have more disposable income + islam calls for alms-giving).
Despite the lower price of the silver, the "tax" is a static fiat-based % so basically more people are donating the same %. All the people that were donating 1.5% if holding a balance over $380 would still be donating it (and the same $amount) if the threshold were $360 (silver price drops), more people would be donating since now everyone between $360 and $380 would also be donating a 1.5% in addition.
If the donation was in silver then it might even itself out, but you'd have to look at a distribution curve of income to know for sure.