The Washington Post reported yesterday that Republican senators were turning their back on a massive spending bill stuffed full of their own earmarks. Those earmarks, the Post noted, included quite a few to benefit Mississippi, the home state of Senators Roger Wicker and Thad Cochran:

Wicker, along with Cochran, had by then already sponsored earmarks in the spending bill that would fund an airport expansion in Tunica ($1.75 million), new riverwalk lights in Columbus ($300,000), improvements to a hiking and biking trail in Hattiesburg ($700,000) and improvements to an assortment of bridges, highways, trails, railways and streets across Mississippi.

A burgeoning Tea Party revolt against earmarks caused the bill to be withdrawn. Senate Majority Leader Harry Reid held a press conference to defend earmarks as the constitutional duty of the people’s elected representatives. (And, as many of our friends have emailed to tell us, held up a copy of the Cato pocket Constitution — 10 for $10 this Christmas season! — to make his point. Ah, well.)

But the real problem here is not earmarks. The underlying issue is not whether members of Congress or unelected bureaucrats spend the money that Congress appropriates for highways and the like. The real question is, why are local roads and bridges and hiking trails and riverwalk lights being paid for by taxpayers across the country?

If the people of Columbus, Mississippi, want new lights on their riverwalk, why are they asking the families of New Hampshire and Indiana and Oregon to pay for them? Shouldn’t they pay for their own lights, and let the people of Hattiesburg pay for their own hiking trails, and let the people of Oregon pay for any roads, bridges, or hiking trails that they value?

The fundamental problem is not earmarks. It is that the federal government is paying for clearly local and state responsibilities. Opponents of excessive spending should not stop at an earmark ban. They should insist that the federal government pay for national needs and leave state and local projects to the states and towns that want them.