The construction industry will spend more than $300 billion during the next decade, employing 9% of the New Zealand workforce. In a briefing paper to the incoming government, industry lobby groups have said a 5% improvement in sector productivity would deliver savings every year of $1.5 billion.Along with a re - skilling of the workforce, the greater use of technology and reshaping regulation were singled out. Peter Silcock is the Chief Executive of Civil Contractors New Zealand Inc, which represents over 600 large, medium-sized and small businesses in civil engineering, construction and general contracting.