Giant Wall Street banks continue to threaten the well-being of millions of Americans. But what to do?

Bernie Sanders says break them up and resurrect the Glass-Steagall Act that once separated investment from commercial banking. Hillary Clinton says charge them a bit more and oversee them more carefully. Most Republicans say don’t worry.

But rather than prevent this by breaking up the big banks and resurrecting Glass-Steagall, Hillary Clinton is taking a more cautious approach. She wants to impose extra fees on the banks, with the amounts turning not on the bank’s size but how much it depends on short-term funding (such as fast-moving capital markets), which is a way of assessing riskiness.

But, if you hadn’t noticed, Wall Street’s investment bankers, key traders, top executives and hedge-fund and private-equity managers wield extraordinary power. They’re a major sources of campaign contributions to both parties.

Key members of Congress, especially those involved with enacting financial laws or overseeing financial regulators, have fat paychecks waiting for them on Wall Street when they retire.

Given all this, Hillary Clinton’s proposals would only invite more dilution and finagle.

The only way to contain the Street’s excesses is with reforms so big, bold and public they can’t be watered down—busting up the biggest banks and resurrecting Glass-Steagall.