Laser focusing on housing and childcare would have been enough to make the point. Throw healthcare in and it's a solid argument. Get into the weeds on individual expenses and you open yourself up to a lot of nitpicking, which is all over this comment thread
He also way overshoots the target. I absolutely believe the current poverty line is way to low, but trying to argue it should be $140,000 a year is insanity. A lot of people will disregard the overall point of the article just due to that claim alone.
It's not rocket science to see that just $2k/mo on housing and $2k/mo for healthcare for four people adds up to $48k, and that means more than $60k pre-tax income is an insufficient total compensation.
I really do pay $15 a month for my phone plan. I've never hit my 5GB data cap.
I do have $30 home internet. So even if we assume two adults and home broadband, we're talking $70 including hardware, not $200, but there's nothing I do on my home WiFi that I absolutely need and couldn't do from my phone while staying under the data cap. But I'm not financially struggling, and it's an expense I'm happy to pay. It's not something I need.
That said, the point is that if you can't watch a tutorial because it'd run over your data cap, it's problematic. So is having too trash of a phone - it's the kind of thing employers will see as a negative signal at a certain point.
Which is to say, sure, maybe you can spend under $200/mo on phones and Internet for one or two people, but realistically you're not spending under $100 without major and problematic sacrifices. And whether it's a $100 or $200, compared to housing, food, other stuff, it's not a wild expense.