The man wants MORE caster. How about this idea?

Yeah, that's what I said. In a perfect world the combination of your static camber, camber gain from the control arm travel, and camber gain from the caster angle would combine to match the lean angle of the car and keep the inside wheel flat on the ground to maximize traction.

@inertia 's question was about fuel mileage, and the way that the geometry works, if everything is set up perfect in a perfect world, you'd maintain the contact patch you'd have when everything is going straight and level. Realistically, the best you'll do is maintain the contact patch on the inside wheel, with the outside wheel patch getting smaller as the weight of the car is shifted. Regardless, you're not going to be increasing the contact patch overall, so, no lost mileage.
The caster will also help keep the outside wheel.vertical or just a bit more negative camber with the lran to mazimize that contact patch also. It is the outside tire that is most important.
When Trans Am changed to sports cars, allowing Corvettes to run with the 911RSR Porsches, yhe Porsches lifted the inside front wheel. The low front mass allowed them to be fast in corners on three wheels. They used a stiff front antiroll bar to keep as much weight as possible on the inside rear for traction to accelerate out of the corner.