The UK has had substantially less wage inequality than the US for a long time. The UK “wage squeeze” is median/minimum wage which has gone from the 1/3 to 2/3 since ~2000 as the minimum wage has been raised. But the relevant difference here would be around 90th percentile/median which is 1.85 in UK vs 2.4 in US and even higher in California.

And over time the ratio is similar - 90%ile about 1.9 times median for the last 30 years.