The average worldwide income is £11,300. But remember that no one is more that £11,300 worse off than this, but lots of people earn millions.
The median worldwide income is about £925. That's right....£925 a year, well under £100/month.
So those people complaining that £30K is rich, in worldwide terms £1K a year is more than most people earn. So maybe those on £12K a year should stop moaning, as you're all loaded.
But we're talking about the UK, not the world, and in the UK in 2015, £30K/year is not rich, and not even close to being a high earner. It doesn't matter is it's in the top 30%, or more than double NMW, it still doesn't make you a high earner.
To suggest otherwise is delusional.