Zdad,
So there you go making this into a thread about someone buying $180 shoes with a voucher. Which did not happen.
What the real point is why is everyone sticking their nose into someone else’s business.
The gabbai tzedakah, entrusted with the funds and likely the person whose sweat and tears went into procurring the funds for the vouchers, felt it is appropriate as did the shoe store owner, who is likeley subsidizing a part of the cost. Where do you find the gall to butt in and make judgements about things you are clearly unqualified to judge?
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That applies not only to monetary issues.