Further, where does it end?
"I want a good brand of disposable diapers, not the cheap ones" (Note: a lot of working families are buying those cheap diapers!)
"I want a $1000 stroller with an easy-collapse handle and nice tires so my kids don't get jostled as I take them over bumps in the park"
"I need a subsidy for a minivan because a small car is very inconvenient with kids"
"I need a subsidy for ORGANIC food, not just any food for my babies."
etc.
The standard could easily become more than the average US household income, without even trying hard to grow the list.
Remember, it's not about ability to have any diapers at all, they're arguing that they deserve a higher standard of convenience.
Meanwhile, I need to commute to work an obscene distance because NIMBYs won't allow more housing to be built, keeping me away from my children for many more hours than I would otherwise need to. But please, prioritize taxing me even more to pay for conveniences for people who are home with their kids while I work to feed mine.
Time spent cleaning cloth diapers is time not spent working and earning money.
Being poor is expensive. Being poor means you are on an hourly wage in shift work not a salary. That means half an hour late for work means half an hour less money.
I wouldn't mind a subsidy on cloth diapers to be honest. The landfill waste from disposables is insane.
How many of us would have to chip in another $10-$20 in taxes to cover those without, so a parent and his/her children can take a shit and dispose of it in a way that meats their commitments as appropriate?