Of course! Economics used to be known as Political Economy, and it ties in perfectly. I was about to apply for HSPS, and I'm probably going to applying for PPE and also Social and Political Studies elsewhere.
Read my post here
http://www.thestudentroom.co.uk/showthread.php?t=2040464&page=2&p=38295047&highlight=economics%20wedding#post38295047 for an outline of what Economics is really about.
Lool your college has been telling you a pile of <insert obscene word here>
The most advanced it gets is finding percentages and multiplying numbers.. there's a bit of graph sketching but it's not mathematical - it's sketching rough relationships like a rough diagonal line to show that price increases with demand.
It's only at uni that Economics becomes more mathematical, but the ideas you study in Politics, Sociology, Psychology etc. all relate to Economics too. It kind of bridges the three areas.