Why not just issue NT$2,000 in stimulus vouchers or cash to each citizen instead of requiring them to pay NT$1,000 in cash to purchase NT$3,000 worth of vouchers?
The reason is that issuing NT$2,000 directly would only generate NT$2,000 in increased consumption per person, while this voucher program will boost it by at least NT$3,000, and actually even more if one includes the effects of various promotional campaigns tied to the program that have been launched by businesses around Taiwan.