They are lying through their teeth - because in the same breath they talk about systemic flaws and risks.
You can draw an analogy between the economics of the country and the economics of a family: You and your wife both make a nice income. You have your cars paid off, $10k in the bank, not much debt. Your economics are fundamentally sound. Then you go on a bender, and in an all-night poker party you end up owing a half-million to the mob. You can debate the soundness of your family economy, noting that the wife just got a 5k per year raise, Your kid got a surprise scholarship, etc. But all this discussion is irrelevant because the hammer is going to drop.