The troubling similarities between the fiscal mismanagement in Washington and the mess in the euro zone

And the temporary fix ignored America’s underlying fiscal problems. It did nothing to control the unsustainable path of “entitlement” spending on pensions and health care (the latter is on track to double as a share of GDP over the next 25 years); nothing to rationalise America’s hideously complex and distorting tax code, which includes more than $1 trillion of deductions; and virtually nothing to close America’s big structural budget deficit. (Putting up tax rates at the very top simply does not raise much money.) Viewed through anything other than a two-month prism, it was an abject failure. The final deal raised less tax revenue than John Boehner, the Republican speaker in the House of Representatives, once offered during the negotiations, and it included none of the entitlement reforms that President Barack Obama was once prepared to contemplate.

The reason behind this lamentable outcome is the outsize influence of narrow interest groups—which marks a second, unhappy parallel with Europe. The inability of Europeans to rise above petty national concerns, whether over who pays for bail-outs or who controls bank supervision, has prevented them from making the big compromises necessary to secure the single currency’s future. America’s Democrats and Republicans have proved similarly incapable of reaching a grand bargain; both are far too driven by their parties’ extremists and too focused on winning concessions from the other side to work steadily together to secure the country’s fiscal future.

The third parallel is that politicians have failed to be honest with voters. Just as Chancellor Angela Merkel and President François Hollande have avoided coming clean to the Germans and the French about what it will take to save the single currency, so neither Mr Obama nor the Republican leaders have been brave enough to tell Americans what it will really take to fix the fiscal mess. Democrats pretend that no changes are necessary to Medicare (health care for the elderly) or Social Security (pensions). Republican solutions always involve unspecified spending cuts, and they regard any tax rise as socialism. Each side prefers to denounce the other, reinforcing the very polarisation that is preventing progress.