Just so I have it straight - if the cleaning, cooking and housework/household maintenance is done by a cleaner/maid/house-keeper and if the child-care and child-raising is done by a nursery-worker/nanny/au pair, then it's a job; it's work.
But if it's done by a wife and mother it's not a job and it's not work?
I've done both. We've recently emigrated so I'm a SAHM until we get settled, at which time I'll go back to work. When I was working full-time we had an au pair - she did a bit of everything. Childcare mainly, but also a bit of housework around that, when she could fit it in.
She got a roof over her head, food paid for, a wage, presents and such like on a regular basis and a bonus at Christmas time. Apparently a 23-year old with no discernible child care qualifications is entitled to all that, but when a mother does it, it isn't working. Not even when the mother gets lumped with the night shifts as well, since the au pair clocked off at 6PM. 
As I say, I've done both. I'm looking forward to going back to the relative ease, peace and quiet of full time work since at least I won't be falling into bed, completely exhausted after 14 hours of looking after a baby, a toddler and the house. I was in a highly paid, stressful job, managing a team of people, but it still wasn't as mentally and physically tiring as this SAHM lark.