In our case, im sponsoring my wife from India and I demonstrated Job status for both me and my wife. I have already sponsored her in family class application. Im PR here. They refused her visa telling that she has no travel history, family ties in Canada and in country of Residence & assets or funds for travelling to Canada. Even I thought earlier that being her husband I'm responsible for her all travel related expenses and for that , I added a financial support letter for her. But it failed for me. I think they look for principal applicants own financial status. I have applied again. will see how it comes out this time.