Arguments about benefits always revolve around a single concept: fairness.
There are timeless questions – who is deserving and who is not?
It provokes sharp opinions and so is among the sharpest of domestic political decisions a government ever has to make.
There is a direct if not immediate consequence of a decision taken in Westminster on the money in the pockets of millions of people, including many who have little or – perhaps and – are attempting to deal with physical or mental health issues.
I'm told that in the last week or so the Department of Work and Pensions has been deluged with the worried – benefits recipients and their families concerned that they may be impacted, without yet knowing the specifics of what the government planned.
It poses a question for the government and journalists alike.
How responsible is it for titbits of ministers' plans to dribble out over more than a week, without the full picture being clear, given the concentration of concern it was bound to provoke among those who feel reliant on the welfare they receive?
The government wants to set out its argument over several days and journalists want to find out what they are actually planning.
But the net consequence is a flurry of worry, some of it perhaps justified, some of it not.
Even now, after the announcement, the complexity of people's lives confronts a complex benefits system, now changing again.
It could be some time before people know how they may be affected and even longer before they actually are.