I was disappointed to find out today that Carrefour will only be charging less than 1 yuan (7 yuan makes up one U.S. dollar for now) for per a plastic bag to customers that don't bring their own. Unfortunately, I don't think this "financial burden" will convince anyone to make a concerted effort to bring cloth bags to the grocery stores.
This is somewhat similar to the situation in the U.S. with gas prices. It's only $4 a gallon gas that will convince someone to use public transportation, buy a more fuel efficient vehicle, and rethink their habits. (My husband, Josh, has been saying this for awhile and here's an excellent Thomas Friedman column on the topic, http://www.nytimes.com/2008/05/28/opinion/28friedman.html?em&ex=1212206400&en=6acc7e173e4e0dc8&ei=5087%0A.)
Some people need to lose green before they decide to go green. The consequences are immediate and personal. I guess, that's the incentive for change that works the best.