Brian Hayes says we are at "the limit" of taxation.
We're taking in €36 billion in taxes. Our entire economy, as measured by GDP (sorry, the thread title needs to be fixed, it's not GNP), is €163.5bn. Source for Irish GDP is the UN, World Bank, IMF and the CIA, by means of wikipedia. They give GDP as between USD$217bn and 221bn.
So the taxman's total share of our economy is 22%. (If we're talking about one guesstimate of GNP at €130bn, then that figure rises to a scarcely-whopping 27%)
Is 22% really a hard limit?
Raising taxes so that spending equalises taxes would bring the percentage to 27%.
That would mean raising taxes by three pennies in the Euro.
Don't confuse that with pay rises to public employees. The money could be devoted to genuinely useful things (even if you believe that no public employee has ever done a tap of work). I would suggest giving Dublin, Cork and Limerick world-class cycle lanes and funding a world-class bus system revamp, buying a new fleet of 500 buses, subsidising commuter tickets so that it only costs 50 cents to get 50% of our workers to and from work.
This would pay for itself almost overnight, because it would shrink our car and fuel import-dependence, freeing billions of € of dead money up for things like paying the mortgages Irish people foolishly took on in the tiger period. Or even buying goods and services.