Alissa Quart, executive editor of the Economic Hardship Reporting Project, hopes readers will take her latest book, Squeezed: Why Our Families Can’t Afford America , as a call to action. Her examination of the disappearing middle class shows that the American Dream is in jeopardy. Saddled with college debt, rising housing costs and fewer well-paying jobs, younger Americans aren’t able to live or save like their parents once did. But there are solutions, Quart says. She  joined the  Knowledge at Wharton show  on SiriusXM to shed light on the issue. (Listen to the podcast at the top of this page.) An edited transcript of the conversation follows. Knowledge at Wharton: There’s a great statistic at the outset of the book: Middle-class life is 30% more expensive than it was 20 years ago. What is the greatest concern regarding this problem of affordability in America?…