We hear this all the time: "although I am socially liberal, I am fiscally conservative." This position is impossible in practice.
By its nature, those who are socially liberal feel that government is more often the answer to society's problems. In order to solve these problems through government, funding is required -- very large and continuous flows of monies. These monies can only come from one place: taxation.
These social programs result in large bureaucracies and many morph into entitlement programs.
Regardless of how carefully the monies are spent, it is money taken from the masses and given to those the socially liberal feel deserve it.
You really cannot be both a socially liberal and a fiscal conservative.