I'm not Irish and I'm a lazy reader at this time so I won't search who's right, but the comment you are answering to was way more convincing than yours.
They're correct on both. The Irish government is running a budget surplus due to massive increases in the corporation tax intake over the last several years. The issue with delivery of housing and projects in this country isn't due to a lack of money, but a lack of capacity. The economy is already running at full capacity and there aren't enough workers available. Throwing more cash at things wouldn't have a material increase in output for several years until supply could ramp up.
I'm Irish and the later is more correct. There isn't going to be a major political crisis over this. Irish corporate taxation is to the Irish electorate what the flag is to Americans. It's quasi religious.
The government isn't really blaming lack of money on the housing crisis more they are claiming it takes time.