Yes. If someone is poor, they have to spend more energy in the day. It’s spent on stress, bad food, drugs (including alcohol), domestic problems, doing chores that could be solved with money, and at worst, working a second job or in the gig economy. Stressed, hungry, exhausted people sleeping on bad mattresses get worse sleep and stay tired.

And you CANNOT mind your safety to the proper degree if you’re exhausted. It’s not a question of wanting to, it’s a question of what’s physically possible.