She was addressing the presentation of her party's election manifesto, which pledges to run budget surpluses of €15 billion over the following five years.
Ms. McDonald pledged to make changes in a number of sectors, including housing, healthcare, and living expenses.
Additionally, she restated her intention to eliminate the USC for individuals earning their first €45,000 per year. Regarding housing, she pledged to put a month's rent "back in renter's pockets" and to outlaw rent rises.
Pearse Doherty, the party's finance spokesperson, maintained that housing was the top concern and that the manifesto was the most detailed available.