Labor productivity is a neoliberal metric that uses GDP per capita, that in actuality measures value captured, not value added.. For example, the most "labor productive" countries in the world, are those tax havens in the caribbean. Considering the Irish economy's dominance by finance capital, that's completely unsurprising that it would rank so high:

The reason that these large companies utilize child labour and forced labour and labour under such conditions is simple; profits. This is where Ireland comes into play, in its role helping these large multinational corporations maximize the profit they gain from exploiting such labour conditions. Of the five companies named in the lawsuit, Apple, Dell, Google and Microsoft all have their European headquarters in Ireland. So, one would logically ask why this might be. Perhaps it is our highly skilled and trained population? Or maybe our location on the very western edge of the continent makes it more convenient for big-wig employees to fly to and from Ireland? Or could it possibly be that these companies are attracted by the striking beauty of our cities, towns and wild landscapes? Or, may I suggest, is it our friendly, open, hospitable and charmingly roguish nature that means companies cannot help but to set up their regional headquarters here? Or could it be that Ireland is essentially a tax haven that allows them to maximize their profits?(14) Ah, yes, I think we’ve found the solution to that riddle then. The study, authored by Thomas Wright and Gabriel Zucman, reveals that U.S. multinationals book roughly 18% of their foreign profits in Ireland, more than anywhere else in the world.(15) Ireland’s laws also help U.S. corporations to achieve a pre-tax profits-to-wages ratio of 800%.(16) In the end this amounts to Apple owing the Irish government €13 billion in back taxes, and a legal dispute with the European Union. In 2016 the European Commission ruled that Ireland had given unfair tax advantages to Apple to the sum of €13 billion, a decision which the Irish government itself appealed. Eventually the decision was overturned by the European General Court in July this year (2020), although further legal challenges to that decision may be forthcoming.(17) It is also important to note that the figure of €13 billion is only for the case of Apple and does not include how much taxes other multinational companies may owe, so the actual figure is so high it does not bear thinking about.

We also did not wholly adopt anything, we have a different type of government, we dont have a monarchy and our elections are not first past the post.

Ireland is a bourgeois democracy / capitalist dictatorship just like GB, and it doesn't matter what form your elections take. The important point is that capital (specifically finance-capital) stands above your political system. Australia also doesn't use FPTP, yet its able to use that voting system to continue its colonization and theft of aboriginal land. These alternative voting systems have proven to be no obstacles in the slightest for capitalists.

We absolutely did not allownfornour bases to be used by foreign military. We did however allow for refuelling by an ally. We also had caveats about what type of aircraft and cargo could land and refuel.

The US racial state, which built its wealth on the graves of its indigenous inhabitants, and enslaved millions of captured Africans, is not a good military ally to have. If Ireland were actually anti-imperialist, there would not even be a debate on allowing the US military to use its bases, especially given the context of its wars on Iraq.

Here's another good article on Ireland's role in imperialism and its internal crises.