The whole premise of this thread is wrong, if you want to relieve an income distribution problem you achieve that by giving poor people money or by taxing them less.
Trying to do it via anything else just results in distortion of markets and inefficiencies like paying someone’s fare that they would have happily paid for themselves or having a user take a seat for frivolous purposes that would previously be used for a socially or economically more useful purpose.
Trains are not an underutilised resource where additional capacity can be created.
Ultimately rail’s best contribution to cost of living is to get cheaper. That’s either achieved by making existing operations cheaper or by putting far more passengers and trains through the same infrastructure.
I must say I’ve seen relatively little from the GBR project explaining how it will incentivise cost reduction. Though were it to do so I suspect that it would be of the cut things and apply more aggressive negotiation techniques than it would be to go look at how other industries do similar things at a fraction of the cost.
"Ultimately rail’s best contribution to cost of living is to get cheaper."
That's precisely what the above options aim to do.
Obviously it would be nice to get loads more capacity all of a sudden, but that's not likely on a short timescale.
Also, a lot of overcrowding issues are caused by short term diagramming/availability issues. I was on a Calder valley service on Saturday evening formed of a 2 carriage 195 and unsurprisingly was pretty rammed. There would likely have been reasonable capacity if the service had been four 9r five carriage (which is quite often for the route).