I didn't at all mean to offend you! I'm sorry that I obviously have.
I only meant to point out that, if you're going to bring into the question the kind of family people are born into, you're no longer talking about income. A person who is 'poor' because their money is sunk into property in a very different boat from someone who is poor because they genuinely have very little.
I do see that someone might have assets but not earn much. That is a tricky situation, of course, and lots of people feel very sad to face selling their assets, whether that means selling off a farm that's no longer productive, or selling of a second home, or selling of a house and going back to renting. Obviously there are huge differences between each of those situations, and obviously they are upsetting in different ways.
But, the fact remains that if we're talking about income, it makes sense to talk about income. You mention a family who seem well off because they were born into a rich family. That does not mean their income is good. If they have to sell of their property, that is very sad for them, but it does not mean we should take them as representative of people in that income bracket, and assume most people have property to sell off.