The failed 1721 bank scheme highlights a striking tension: supporters imagined cheaper, more reliable credit that might keep capital in Ireland, whereas opponents feared speculative instability, government influence and a shift away from land-based power. Its defeat preserved private, fragmented finance, yet the close October vote suggests genuine uncertainty rather than simple resistance to commerce. The debate also raises questions about voices excluded from Parliament, including Catholics excluded from political power. To what extent should the rejection be understood primarily as prudent caution after the South Sea Bubble, rather than as an attempt to protect existing landed and political interests?