Gillybob, I do understand your feeling that (if this comes off) you would like to spend the money on things you need rather than want, and I am not picking on you, but this is not the same as people getting food vouchers instead of benefits - it is simply a way of giving local businesses a boost whilst also giving taxpayers some of their money back.
The alternative is to use taxpayers' money on furloughing workers and/or paying the rents of business owners, and there being a direct transfer of funds with no payback for the taxpayer.
There is no snobbery, and (as I understand it so far) no unfairness at all - if people don't want to spend the vouchers they don't have to. I don't suppose there is anything stopping people from spending them on something and selling it on, then using the cash to pay the mortgage or on groceries.
It is, in effect, 'given money' - no-one is losing out - so I don't understand why you think the scheme 'stinks' (although I appreciate that you would rather have more freedom of choice in how to spend it).