True fiscal conservatism is often at odds with social conservatism. True fiscal conservatism isn't a bad thing - I think many Dems would actually lean more toward a purely fiscally based Republican party, but the social issues keep everyone split into their respective camps despite the similarities in fiscal policy. For example, a true free market conservative has no problem with abortion clinics. They provide a service for which there is a demand. No federal dollars are permitted to go to abortion services, although the clinics also provide everything from well baby services to OB/GYN services in rural areas that require some community funding to fully support (since it's not profitable to operate a small clinic in the middle of nowhere that only half the population + children will use.) Still, it makes monetary sense to fund those clinics at nominal levels rather than have pregnant women dying because they were unaware of ectopic pregnancies, so again, it's government money well spent. A social conservative looks at the clinic though and sees a horrible infestation of sin upon the world and has the urge to bomb it.
Another example would be the mandatory drug testing put in place in Florida for food stamp benefits. After the pilot program in which less than 2% of those tested failed the drug test and were denied benefits, it became clear that the state was losing money and the program should have been halted. (I believe it cost them $100,000 more than they saved to test everyone, even charging some people a fee for the test.) A business minded fiscal conservative would have killed the program because it cost more than it saved. A social conservative would freak out because The Undeserving could get free food if the program was cancelled.
It's this divide in thought between the two wings of the party that drives the fiscally conservative Democrats crazy. They might be willing to compromise with the Republican fiscal wing on some things, but the social wings of either party cannot compromise because they each think the other is Satan.