If you believe the conclusion that 50% of small businesses don't have cash reserves for a month(https://news.ycombinator.com/item?id=22719981), and ~50% of Americans with jobs work for small businesses, it's not far fetched to think that 25% of people will soon be unemployed. Add in the people working for larger firms, like travel and vacation related firms, and you can easily get to 30% unemployment.