Charles Haughey was the most important Irish politician in the modern era.
Define "modern" as you will.
Whether "important" be measured by power (during his career,) influence (thereafter and projected forward,) controversy (none would compare,) or wealth (heh heh,) no Irish politician compares.
Charles Haughey leaves a complicated legacy. Hah.
Offshore bank acounts
Enriched self during Irish poverty.
Established policies that allowed Irish economical growth.
A man of the people.
Big spender 300k pounds per year, 1989-91 (This was a massive sum in those years.)