Jack Pierse knows a thing or two about building businesses. Within the space of 20 months, Wayflyer, the e-commerce financier he co-founded with Aidan Corbett, went from embryonic idea to unicorn, achieving a $1.6 billion valuation earlier this year after closing a $150 million funding round. Wayflyer might be located in Dublin, but it competes internationally – for customers, for funding, and for staff. That is what made Pierse’s intervention at a Scale Ireland event this week so thought-provoking, and to many, provocative. With Paschal Donohoe, the Minister for Finance, sitting on the stage beside him, Pierse spoke honestly about…