I think bus and train fares are too high anyway and that's why those with free bus passes are resented so much. Younger people probably also fear that by the time they reach bus pass age, the whole scheme may have been ditched.
I can see both "sides' " point of view.
I was born in 1950 and at that time it was quite unusual for young people from a fairly ordinary background to go to university, let alone have a "gap year". Not as many people had cars, owned their own homes or holidayed abroad. Many young people started work at the age of 16/17 and were expected to give something towards their "keep". Although there was hire purchase, I think it was some time before the credit card was introduced and used more widely.
In the last thirty years or so, credit cards were heavily marketed as the magic way to get whatever you want whenever you want it. So there was an explosion in buying on credit - holidays, clothes, cars, etc., and this became, for many people, the "norm".
When the whole thing came crashing down around our ears, we were encouraged to look for the "culprits" and these turned out to be, not the crazy, virtually unregulated banking system but: the "greedy/irresponsible", the pensioners, the unemployed, the immigrants, the public service employees, the "malingerers" - well, just about everybody but those that actually caused it.
Now that we have paid our mortgage and are both in receipt of fairly good pensions, I would say we are comfortably off (though I agree "ninathenana" it's probably unwise to be too complacent as who knows what the future holds). We have both worked quite hard, but I'm sure working people today, in the main, work just as hard, if not more so. I think we have not been more virtuous but more fortunate. But we have helped our children quite a lot financially and practically, as do many parents/grandparents.
Although many people these days have much more "stuff" than we had in our youth, access to the necessities of life is becoming more problematic. The homes being built now are much smaller and more expensive, rented housing is equally expensive and very insecure, energy and transport costs are a major part of the budget - and, most importantly I think, average earnings have fallen dramatically.
It's no wonder that people are angry and resentful but a shame that that anger is, in my view anyway, misdirected.