i've seen what you're talking about in a lot of autocross pictures.Having owned two Mini Cooper S and a series of Rabbits, let me restate what I previously posted.
The original BMC Mini, Mini Cooper, and Mini Cooper S all had a true Independent Rear Suspension (IRS) and ironically handled just like a MK1 FWD Rabbit or Jetta by lifting its inside wheel on a corner. Just an inherent factor of a FWD vehicle.
An IRS on a MK1 Rabbit or Jetta would not handle any better than the IRS on the Mini.
and what you're saying makes sense.