I don't know which wealthy, western country you live in, but to be clear in the US Acela trains get up to 150 mph (241 kmh) -- admittedly in a short section, but with other sections that have a top speed of 135 mph (217 kmh). The entire route from Washington to New York has an average speed (
including stops) of 90mph (140 kmh).
Should Acela be faster? Probably! But people should be clear-eyed about what the reality of the situation is.