I don't think it's a left-right thing. It's more about being willing to act in unpopular ways for the long term benefit of the country, which successive British Governments have been unwilling to do. And you can´t really blame them, look at the WFA palaver. Although not brilliantly managed, the reasoning was correct, and people who can afford to pay for themselves, should.
Also other countrie have "agreed" long term strategies that all parties abide by. In Sweden, for example, Government borrowing is restricted by praxis so the country has to live within it's means i.e. a chancellor can't spend more than they take in revenue. There are exceptions, large scale building projects, for example, that are payed off over 75-100 years. You can spend in the boom years, but not in a recession. It's understood by everyone.
The same with benefits, although nobody starves, a life on benefits isn't an option here, it is a subsistence level of aid. On the other hand, childbenefits, parental leave, disability alowance and care are at a much higher level.
Now I have got myself to a position where I can just about afford a relatively comfortable retirement...
As of 1st January Sweden will abolish the retirement age and instead each individual will get advice on when it is "financially sustainable" for them to retire. It's a huge change, but it's clear the current system will be unsustainable in the future, so something has to be done.