@burcinc-- That's right. Almost always, a different monetary policy will be enough to help the economy recover. But if the situation is very bad, such as during a recession, then fiscal policies will also be necessary. This is actually when fiscal policies, like increased government spending, is most effective.
If the economy is not in a very bad situation, greater government spending will not be as helpful because it might end up limiting private sector spending. This is especially true if the government is borrowing money from the private sector.
I guess we could say that increase in expenditure is not the best fiscal policy instrument. It should only be used when it's really necessary.