A third line of criticism is that Sanders' and Warren's proposals are just too big: they're risky, they may fail or have unintended consequences, they'll be difficult to implement.
This argument might be convincing if the problems Sanders and Warren address were growing slowly. But if anything, they're speeding up. Experts on the environment, health, education and infrastructure are nearly unanimous: these problems are worsening exponentially.
We can no longer pretend that climate change, a wildly dysfunctional healthcare system and a yawning deficit in public investment pose insignificant challenges. Doing nothing or doing too little will make them far worse. Obsessing about the cost of addressing them without acknowledging the cost of failing to address them is dangerously irresponsible.
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