There is another thing. British settlers were very independent people, even in England kings were forced to accept the extensive code of liberties. Puritanism enforced this independence and American Revolution sealed it.
On the other hand, if we look at Mexico - the Spanish settlers were in part impoverished nobility looking for the serfs, the majority of population there derives from Indians subjugated earlier by despotic civilization, the Aztec one being the chief example. Spanish conquest was a LIBERATION by their standards a true gift offered by the strangers.
The main civilizing power was conservative and monarchical Church hostile to Reformation.
The society evolved into oligarchy ruling over disfranchised, the political system oscillating between populist uprisings and reactionary dictatorships.
The center of Mexican life is family, church and informal networks. The corruption is a method of survival.
Maybe. My ancestors came here from Scotland, by the available information most likely traveling light and fast in the dead of night, with the British not far behind.