Tax/pension question

Mrs Bloggs and I are both full-time PAYE workers, each earning approx €65,000 pa. We have three little Bloggs, and Mrs Bloggs would like to look at reducing her work commitments, for a few years at least. I have a good pension (public sector terms) while Mrs Bloggs has three small pensions accumulated in various employments. My question is this; How can I reduce the amount of tax Mrs Bloggs and I currently pay while accumulating asset value that will augment our pensions in the future? My instinct is to think that the answer lies in tax based property investment, but I’m not sure how it works for PAYE people, nor where to begin. All advice welcome.