Raising children on a benefit is not an "unpaid activity"

From Census 2013:

Proportionally, more Māori and Pacific peoples spent time looking after children from their own households (42 percent and 41 percent, respectively), compared with other ethnic groups participating in this unpaid activity (around 30 percent each).

I dispute the term "unpaid activity". For many parents, time spent "looking after children from their own household" is time spent on a benefit, usually the Sole Parent Support (SPS). Each week they receive a payment from the government to look after their children.

"Unpaid activity" somehow suggests an altruistic motive. It is misleading to lump together people who are sacrificing earnings to raise children with those whose are raising children as a source of income.

Characteristics of working-age recipients of SPS at the end of December 2009, 2013 and 2014
	Dec-2009	Dec-2013	Dec-2014	Annual change
Male	8,391	6,823	6,093	−730	−11%
Female	78,676	71,020	66,441	−4,579	−6%
NZ European	32,378	26,976	24,329	−2,647	−10%
Mäori	37,275	35,662	33,940	−1,722	−5%
Pacific peoples	8,797	7,536	7,052	−484	−6%
All other ethnicities*	7,059	6,552	6,196	−356	−5%