A lot of sociology is unfalsifiable. However, this is a field in which many people still look up to Marx--a sociologist whose predictions were falsified in a rather spectacular way.
Foundational microeconomic theories, however, are easily verified in many everyday cases and frequently used to make money in practice. Furthermore note that we're pretty sure about when the foundations apply and when they don't. Being able to say "I know when this is true" is a very powerful thing. The non-economic side of sociology can't say anything like that.
