Disclaimer: I live in a relatively prosperous community. My perspective is skewed accordingly.
Your numbers seem fictitious to me. 78% of Americans living paycheck to paycheck? Look at what they are spending their paycheck on. One car per person. 2.1 people per house. 3.2 game consoles per person. A new laptop every 15 months. A new car every 36 months. A new $800 smartphone every 11 months.
Every low-income 10 year old I see is carrying around $1000+ of electronics and treating them like they're disposable. But our school district offers free breakfast to 100% of the students. We have student parking lots for 16 year old kids.
We're all living paycheck to paycheck, but I claim there is still huge excess. Giant houses for average families, computers, ATVs, boats, cars, TVs, 2 movies every night, 4 Amazon deliveries a week, direct access to Chinese suppliers, personal juice presses, occasional cruises.
Air-bnb and uber are not luxuries for 1%ers. These are basic human rights chiseled into the constitution.
There are, of course, truly poor people in the population. But our definition of poor sure has changed a lot in 50 years.
Show me any random collection of 10,000 Americans and I will show you $2 million/year of disposable income without sacrificing a single smartphone or smart TV.