Some serious wisdom bombs on been posted on this thread alerady. I'll chip in with my thoughts...
While the "75" number is typical scary knee-jerk media fodder, there is little doubt that SPa will need to be raised, and will probably drag everything else related up with it.
The way it is looking at the moment, SPa for most Gen-Xers will probably be 68, and for Millennials 69 or 70, and I think its likely the access to private pension money will be linked to 10 years earlier. This is just a reflection of the balance betweeen life expectency and wealth accumulation for the general population.
Aspiring FIREes are atypical of the general population, so it follows that that we need to think outside the box and consider other options. I'm funding both Pension and ISA, and I imagine just about everyone else here is too. I only wish I had opened a LISA in the few months it was avaliable for me to do so (I'm 42), but that windows of opportunity has unfortunately passed me by now.
I do agree that this is one of the things that won't be changed politically until it is forced upon us as a society. Whoever is in office will kick the can down the road for the next lot to deal with. In a way this suits us, as you can bet that dealing with it "properly" with a system that is sustainable for everyone will mean much more restrictions than already in place. We don't design the system, we just play it to our own advantage as best we can.