That's funny, because I'm currently a developer thinking of jumping to finance for the money. No matter what I do, I will always continue doing development on my own time in the form of side projects. Today with stuff like Github and if you have the time, mingling with other developers isn't too hard (if you don't mind the distance).
Whether you work in finance or as a developer, your worth to your employer is dependent upon the value you bring to your employer. Might be an idea to look at what you enjoy instead of being fixated on the money.
