I expect most loving parents would want some form of inter-generational fairness.
Post-2010, the spending cuts have disproportionately fallen on the young.
Fair and stable societies probably require some form of inter-generational fairness or need to spend more on policing and criminal justice and even the rich probably face an increased risk of violence. My investment banking acquaintances are clear about the absence of a magic money tree unless there are losses to be socialised.
Governments in the UK seem to prioritise the voting elderly. There is an argument that the retired can't easily return to work to earn but IMO this is driven more by an electoral agenda, supported by the UK press. I don't see this government being driven by similar notions of fairness in many other aspects of their policies.
Houses are much less affordable in England. Government schemes like help to buy appear to lead to further increases in prices as basic economics would have probably predicted.
Relying on the cascade of wealth, much like 'trickle down economics' doesn't work.
The impacts of house price rises, zero hour contracts, young people studying longer to enter careers that now have a baseline of bachelor or post-graduate degrees leads to hard decisions about settling down and family size. People always had to make decisions about funding families but the changes compared with thirty years ago+ feel adverse though climate change will probably require reductions in family size. I can see the wealthy might like the poor to reproduce less.
I doubt there'll be an appetite for broad reductions in pensions or directly taking savings though it may be that inflation and tax rises achieve the same thing if that is the way the UK government choose to handle COVID and structural deficits unless the successor to QE or a new invention can kick the can down the road. The wealthy have benefitted from 2010-onwards austerity but it doesn't look like it has helped a sustainable economic recovery though it has enabled a vast wealth transfer to the wealthy through asset price inflation. That didn't happen by accident. The 'triple lock' probably won't survive in the medium term.
I can see why the OP has said why they have and why young people feel relatively aggrieved.