Unit 2: Why macro policies might not work

You know how economic theory says an expansionary fiscal or monetary stimulus to the economy should work, but...........

http://business-studies.typepad.com/economics_teacher/2009/02/smart-consumerism-and-economic-theory.html

a) Why does this Economics teacher post suggest the policy makers might not be successful?

PS If you have time, read the whole article via the link