The middle-class has been decreasing in size for years, no one factor can cause this to happen. The economy won't be able to grow without Americans putting money into business, with high bills and debt Americans struggle financially. There are possible solutions to aid this wicked problem to assist Americans with proper financial funding and government oversight. Too many Americans struggle to make ends meet, this has been a continuing trend in America that has only gotten worse over recent years.
boyer, rebecca c., "Wicked Problem in the Middle-Class" (2020). English Department: Research for Change - Wicked Problems in Our World. 5.