Michael Noonan (Limerick City, Fine Gael) | Oireachtas source

I can get the exact figures, but it actually works the other way around. USC is on a broader base than income tax so a 1% increase in USC brings in more money than a 1% reduction in income tax. That is because the tax breaks that are availed of by some high-income earners are not subject to income tax, but USC applies to them.