That's mostly a matter of economic incentives. It's technically possible but it's similar to the idea of a rich person lighting a pile of money on fire.
If a proposal to raise the cap is introduced, price would react negatively, hurting miners, and making it more (relatively) expensive to mine. It's unlikely there is any scenario where it is economically feasible to try to raise the supply cap.
Can you point me to some more thorough analysis of your claim? I've heard such things before but I've never seen it modelled and worked through. Until I see such an analysis I can't help thinking the argument is "we've thought about it a bit and it seems like it will be OK".
If a proposal to raise the cap is introduced, price would react negatively, hurting miners, and making it more (relatively) expensive to mine. It's unlikely there is any scenario where it is economically feasible to try to raise the supply cap.