Taking cash is not immoral.
It is a necessity.
I always offer my custards the choice:
Cash - cheque - or credit card.?
The invoice is always printed with one of the following messages...........................
Thank you for your prompt payment via CASH
Thank you for your prompt payment via Cheque #
Thank you for your prompt payment via Credit card, Transaction #
Keeping the books legit, is essential to remaining within the law.
If we don't pay taxes, how are those that depend on it, going to buy their essentials. ?
Maybe drug tests should also be essential for those that depend on our taxes also.

Shorty.