Government regulation is a quick substitute for economic incentive. Mandate that delivery services have to charge $$ per box or utensil, and you'll see the counts drop pretty quick. Same happens in grocery stores in several states in the US.
Consider this: in the US and UK, sales tax (or VAT) is mostly enforced via the threat of a random audit. In China, official receipts can only be issued on government-issued stationery, printed using computers that are connected to the tax bureau. The threat of random audits is too weak, and open to corruption and uneven enforcement.
