Most of us wash our hands even though we've never seen a germ. But when it comes to personal finance, hardly anyone "washes their hands" — and the mistakes are expensive. Justin Wolfers, back from a Stanford keynote to finance educators, argues that ignoring sound financial advice may cost people somewhere between 2% and 10% of their lifetime consumption — putting it in the same neighborhood as the welfare cost of climate change, and dwarfing the 0.1–1% economists usually assign to business cycles.

So why won't people listen? Because the public doesn't trust economists: surveys show they rank barely above politicians in favorability. Justin makes the case that the fix isn't more experts screaming about interest rates — it's using plainer speech, telling better stories, showing real empathy, and laying out one clear action at a time. Here's what's in it for you: the employer match you're leaving on the table, the credit card interest compounding daily while your cash sits in savings, the actively managed fund quietly skimming your returns. Small mistakes, moved across a lifetime, add up to real money — yours.

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