I seriously doubt there was a concerted effort to transplant Protestanism to encourage "Free market" views that strikes me as fantasy.
Far more likely is that Protestanism ie the American version had become established and wealthy enough to spread out into the world.
Voting, property rights, education and remittances from America helped then jump a rung on the ladder, the big driver of the day is shame for surviving an Gorta Mór and shame for being poor.
Everyone who rose to prominance at that time was basically either a child of the famine or raised by famine survivors that caused deep deep anger.
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