You call no one. You buy a safe of your own. You start buying your groceries in two transactions, one with your card like always, the other in cash. Every other time you fill your gas tank you use a little of the cash. Clothes are all cash till that safe is empty. Buy all your gifts from the farmer’s markets or other “street walk” events. Who cares if it’s more than you normally spend, the point is that officially, you bought no gifts. Cash anytime you go out to eat.
Get what you can from Facebook marketplace or Craigslist, but never anything that would mean title or registration. Those all need to come with deductions from bank accounts you can point to. The point is that by “cutting” a bunch of explainable expenses, you can eventually save up for the big spend item and buy that officially.
Then your nation is missing out on an obvious tax opportunity which is far less punitive than almost any other tax out there since it relies on someone being fortunate enough to stumble over some money.
so what you mean is when i hit the grocery store i should buy half of the things with cash and the other half with card? wouldn't that be more suspicious than just buying it all with cash this time and next time i use card and so on?
Thing is, it's not that uncommon to do this, and it's not like the cashier is going to report you as suspicious to the relevant tax authority. Sometimes people don't have the full value for groceries in their bank account, or are right at the tip of their credit limit - but do have cash on hand to cover the rest.
The point is to have a paper trail/transaction history of lesser value for the tax man. Two transactions in one visit is just as valid as two different visits using different payment methods.
Comes down to whether you feel awkward doing the first one I guess (cashiers generally won't think twice about it, aside from maybe mild annoyance). It is a classic "Things aren't going great for me rn" move - but who cares, you know the truth.