If slapping a surcharge on plastic bags leads to people chucking icky waste down rubbish chutes without bagging it first, who is responsible for containing the problem?

Some social media users say it is each individual's responsibility - buy garbage bags, please. Some point to the Government - hand out free plastic bags. Some even point boldly to FairPrice supermarkets - don't charge for plastic bags or else the dirtying of chutes all over Singapore is somehow their fault.