That's income, not disposable income. It's also median, instead of mean. It's also wrong. Median income in the UK is £39,039 which is about $49,500.. You linked to the US Wikipedia page twice.
OECD is the source for disposable income.
US: https://oecd-better-life-index.truth-and-beauty.net/countrie...
UK: https://oecd-better-life-index.truth-and-beauty.net/countrie...
Yeah, OECD is saying the mean disposable income is the US is almost the same as median household income.
Either some of the numbers are wrong, or your (OECD’s) use of mean is misleading… the mean of Bezos’ and my disposable incomes is a very large and mostly useless figure.