Sue, I heard the other day that the two should be kept seperate. They can get weekly pocket money as being part of the family and they have responsibilities and chores as part of the family. They shouldn't necessarily be linked.
Parents don't get paid for running a household so I suppose kids shouldn't either. However if it's extra jobs such as washing a car etc then they can earn extra pocket money for that. Just not for everyday jobs as such.
Hope that makes sense....