The Collar Around the Heart by Old Softy Science Fiction is most impressive when used as social commentary. Old Softy seems to understand that in this delightful tale of a future that seems so similar to a past.
Saving Sister by Shrink42 A number of Shrink42 stories deal with women putting themselves into a kind of voluntary slavery to achieve personal improvement. This is a terrific example of this type. A very caring family demonstrates the lengths they will go to in order to help their own.
Service Society by Lazlo Zalezac Lazlo has written a number of stories where a fairly ordinary person or group of people come up with ways of living better or making the world a better place to live in. Each story is different and all are wonderfully uplifting. Service Society is the most recent of those. Also check out Commune, A Different Sort of Lifestyle, Country Boys, The Millionare Next Door and any number of others.