One thing to keep in mind is that the demand of services is fairly elastic. If the cost of legal services go down dramatically the demand will go up quite a bit. The reason many people don't use these services is because of cost and decide to forgo/settle.

I bet there will be a lot of refinancing of mortgages if the closing costs were $500 and the process was one click.

I presume that this is the case with a lot of professional services. In that sense service based economies are better situated than manufacturing based economies.