My husband and I are fairly average earners, between us, household income well below 6 figures, big mortgage, we don't really struggle, but we do budget. I partly agree with you that some of the top 10% may be out of touch regarding the struggles of the bottom 50% as you sometimes see threads on here saying, I'm 30+ and only have £500k in house equity and £200k in savings, is this okay or should I worry?
However our biggest problem is not families on 6 figure salaries and big mortgages. It is the people with 8, 9 and 10+ figure bank accounts!
There is a reason why multi millionaires and billionaires are getting exponentially richer whilst the bottom 95%, even those on 6 figure salaries, are feeling the COL crisis more and more.
Rich getting richer and working/middle class getting/feeling poorer is demonstrably linked! We do genuinely need a wealth tax, and we need to get the world on board! No one person should be a billionaire, it gives an individual too much power and political influence, I mean what is wrong with capping personal wealth including assets at 100 million? More money then you could possibly spend in a lifetime?
Billionaires should not exist on a planet where children go to bed hungry and people die from cold, heat or lack of sanitation. Its crazy that we as a species have allowed this. I mean we're literally burning the world to stuff already overfilled pockets. Climate change should bloody frighten alot more people, even if starving kids don't.