That doesn't seem like an accurate re-telling of the Irish famine.
The British government engaged in many kinds of relief effort. They bought food from America to import it, albeit screwed it up because Ireland didn't have sufficiently advanced mills to process the imported grain. They repealed import tariffs (the Corn Laws). Large public works programmes were created to employ the devastated farmers. This was all made more complicated by an Irish attitude that to ask for charity from the English was weakness and should never be done:
https://en.wikipedia.org/wiki/Great_Famine_(Ireland)#Charity
William Smith O'Brien—speaking on the subject of charity in a speech to the Repeal Association in February 1845—applauded the fact that the universal sentiment on the subject of charity was that they would accept no English charity.
Mitchel wrote in his The Last Conquest of Ireland (Perhaps), on the same subject, that no one from Ireland ever asked for charity during this period, and that it was England who sought charity on Ireland's behalf, and, having received it, was also responsible for administering it.
Despite this large sums were donated by the English through private charities anyway.
What you're referring to is a later stage of the famine whereby a new Whig government came into power, and it did indeed feel that the market should be left to sort things out. So it stopped intervening against food exports, believing that would make things worse instead of better (i.e. people who were successfully growing food despite the blight would have to sell it below cost and would go bankrupt). Even so, it still organised a public jobs programme so huge it became impossible to administer (over 500,000 people employed).
That state lasted all of six months before the government of the day realised it had failed and changed tack again, switching to a mix of direct relief through soup kitchens and the like.
So your claim that there was "deliberate inaction" is hardly true. There was lots of action at all times and the debate focuses on to what extent the action was incompetent or not.
Food exports from poor countries are a tricky subject even today. African countries export food to Europe and would export far more if it weren't for the CAP, even though Africa has famines, hunger and disease. Should they be prevented from doing so, or will trade enrich them and ultimately end their poverty?