Portugal and a few other countries have that, too, it's very effective. https://www.economist.com/finance-and-economics/2019/02/28/governments-use-receipt-lott

Portugal and a few other countries have that, too, it's very effective. https://www.economist.com/finance-and-economics/2019/02/28/governments-use-receipt-lotteries-to-boost-tax-compliance https://www.economist.com/finance-and-economics/2019/02/28/g...