Exactly this, logarithmic scales for the win.

It doesn’t say who is wealthier just if there are more people in a higher or lower income bracket or not.

So it means at that income level 40% of Americans make that or less. However at that same income level 50% or Canadians and British make that much or less. So for that middle income area the US generally has a higher percentage of their population making more than Canadians and British.

However as you described at the low end incomes the US has a similar or larger proportion of people with very little or no income at all.

It’s tough because you’re comparing percentages with each other and percentiles are kind of funny.