You don't want a lecture on this from an embittered old Lefty like me.
You just want to go to the Equality Trust to read the evidence yourself (don't forget to download the PowerPoint). You might also want to check our Richard' Murphy's calculation of how we might very,very simply pay to put some of this right.
But perhaps you think these are equally embittered old Lefties, or foolish 'head-in-the-clouds' Quaker types?
Oh well, perhaps the Financial Times will convince you of the seriousness of the situation then. Or the Guardian's graphics of the numbers suggested by the Equality Trust folk in their book, The Spirit Level.
Equality is an ideal. Maybe it can't be fully achieved - but the closer we get to it, the better the society we live in. & we've getting worse each year for 30 years.