I am from a country where there are 2 economies. One above water and one below. Cash allows you to hide revenue. You do not forward the sales tax / VAT of the

I am from a country where there are 2 economies. One above water and one below. Cash allows you to hide revenue. You do not forward the sales tax / VAT of the item you sold, and you don't declare the revenue of the cake. Added to that you need the cash to pay your suppliers, as they need cash to pay their employees partially in cash, as employment taxes are sky high.