To clear, let me reiterate your need:
When you create the Job BO, you want to populate certain attributes with attributes from the reference attribute ps_MasterWageDetail. It seems you may need to do this based on one or more attributes entered in the Job BO during creation. If I have this right, here's my approach.
In the Update rules for the Job BO, add the following rule:
IF Job IS NEW THEN
FIND MasterWageDetails WHERE ([your_criteria])
Job.Attribute1=MasterWageDetail.Attribute1
Job.Attribute2=MasterWageDetail.Attribute2
etc...
I imagine the user selects MasterWageType from the MasterWageDetails BO. This is easily done when defining the MasterWageType attribute on the Job BO form. You will also want a rule to ensure MasterWageType is defined such as:
IF (Job IS NEW OR Job.MasterWage WAS CHANGED) AND Job.MasterWageType IS UNDEFINED THEN
REPORT ERROR 'Master Wage Type must be defined.'