The fact is that we have a generation of people in their early 70s/60s/ and a group of those in their late 50s who have been allowed to retire far too early already.
Yes they worked hard for their pensions under the terms at the time but successive governments have kicked the can down the road and we now have a mess where many people are going to spend nearly as long (or longer) in retirement as they did in work. Their state pensions are "triple locked" so they will automatically rise, many of them have very good pensions of the final salary company/public sector sort that will pay them out more than they ever paid in, they receive pretty good benefits in terms of bus passes, heating allowance too! This just isn't feasible.
The problem comes that it has to be paid for, so that generation won't be paying for because they are a big voting group, so younger generations, especially those who are starting out in life are going to pay for it. The problem is that this generation are the ones that are saddled with debt for their educations (basically anyone under 40) and can't afford higher pension contributions of their own.
I totally feel for this generation of people, they're fucked, house prices are sky high, rent is too, they pay more in terms of NI, VAT etc etc than previous generations and the barriers to entering well paid, secure jobs are extremely high.
You can't lay the blame at one door, it has to be laid at the feet of every Government since the 1970s as they new this was coming and did fuck all to solve it as it was a vote loser.