They sourced funds, not from reckless foreign speculators (there were such, but they did not buy low-yielding Irish bank bonds! ), but in a highly liquid international market for what were considered safe bank bonds and deposits.
In the long term, the projected demographic decline (due to population ageing and outward migration) will exert downward pressure on potential growth, which could, however, be offset by high investment and total factor productivity growth, as well as by raising labour force participation (especially female) and reducing structural unemployment. It is therefore crucial to continue implementing the necessary structural reforms to boost TFP growth.