It's cheaper to offer a 10% gift voucher than a 10% discount. Where I live, most people approve a pre-filled statement. This boosts tax revenue, because people

It's cheaper to offer a 10% gift voucher than a 10% discount. Where I live, most people approve a pre-filled statement. This boosts tax revenue, because people don't think twice about deductions that are not pre-filled. It's more convenient not to do your own math, if you trust the actor who does the math for you.