Finn Kydland and Edward C. Prescott (KP), the 2004 Nobel laureates in economics think that technological shocks can explain 70 percent of economic fluctuations in postwar US data. Unfortunately their quantitative methods are simplistic and ignore the real problem: central banking.
Medicare for All advocates claim they are increasing access to medical services. But the plan mostly just increases demand without increasing supply. The "solution" comes later with price caps, tax hikes, and shortages.