I agree with my colleague. You mentioned 35 million tourists, but many of them do not require a visa. Of the 35 million, perhaps 11 million are Americans, and I don't know how many really require a visa.
With regard to the super visa, there is 80% acceptance, but that means 20% rejection, which seems very high to me for families trying to get their parents and grandparents here on a temporary basis. It seems like a high figure. Perhaps I could suggest to your department to look at the numbers of reapplication when people are rejected. If they reapply, what is the acceptance rate there? Perhaps that could inform the department of where some improvements could be made to make the system more efficient.
I suggested an interview process, and that's what they do in the States. They do a lot of in-person interviews. It's costly, but perhaps you could pilot it just for those cases where you are rejecting applicants. Before you reject them you would have an in-person interview, and perhaps that might help to get some approvals for people right off the bat whom you would otherwise be inclined to reject.
I want to re-emphasize that if you're going to do an appeal, it has to be speedy. If somebody's applying to come over for a wedding, or because some family member is ill, they need the approval right away. We can't have a long process for appeals.