In conservative-controlled states across the country, a movement is brewing to amend the U.S. Constitution.

Conservatives are just six state resolutions away from the 34 they need to hold a new constitutional convention. They have the backing of major conservative activist groups, powerful corporate and business donors, and GOP establishment heavyweights like Jeb Bush and John Kasich. And they have a singular aim in mind: requiring the federal government to balance its budget each fiscal year.

Sounds reasonable, right? Everyday American households and businesses have to balance their budgets, at least over the long haul, or risk facing the wrath of creditors and bankruptcy. Why shouldn't the federal government — whose debt seems destined to just keep growing — be held to the same basic standard?

But as sensible as a balanced budget amendment may seem, applying this logic to the federal government would result in an epic, flaming disaster of Hindenburg proportions.

Imagine what your life would be like if you had to ensure that each year you didn't spend any more money than you made in that particular year. How would you ever buy a house or a car? What if your kid had an accident or an illness, piling up medical bills?

The same is true for business owners. How would you buy new retail space or trucks or invest in any big project? Or bounce back if a fire burned down your store?

Governments need the ability to spend big in emergencies and special situations, too, just like you do. And often, that means borrowing money.

But really, you shouldn't think of the federal budget the same way you think of a household or business budget. It's a completely different thing, subject to a completely different set of forces. Why? Because the federal government is utterly unique in its power to control the currency.

This gets a little muddled, because Congress voluntary split this power between the Treasury and the Federal Reserve. But ultimately, they're both parts of the same federal government. And whenever it wants, the Fed can create money and use it to buy government debt, lowering interest rates and effectively transforming that debt from a liability into free money conjured out of thin air.

Households and businesses, by contrast, can't create their own money. So they sit within the forces of the economy, with the health of their own finances waxing and waning along with the business cycles. Even state governments, though they're effectively immortal and have the legal power to raise revenue with taxes, don't control the currency they operate in, and are stuck in the same boat.

Critics view this as a cheat by the federal government that threatens runaway inflation. But it actually allows the federal government to serve a critical role: Whenever the economy fails to create enough jobs for everyone on its own — and it fails a lot — the government can step in and drive us the rest of the way to full employment. Inflation, which is currently rock bottom, doesn't become a threat until we close that gap.

So the federal government has the power to sit outside the forces of the business cycle. It can fill in whatever gaps the economy can't fill on its own, counterbalance recessions, and make sure everyone who can be employed is employed.

The deficit is critical to this. Whatever money the government raises in taxes is money it removes from the economy, just as spending injects money in. Whenever the two flows balance, the government is effectively leaving the economy to its own devices. There are nuances here: Some forms of taxation hurt the job supply more than others, and some forms of spending help more than others. But generally speaking, the degree to which the government is fulfilling its counterbalancing role can be measured by the size of the budget deficit.

This is why the government has nearly always been in deficit. The mid-century period may have featured lower levels of unemployment than today alongside lower deficits, but it also rode the happy aftereffects of World War II — probably the biggest single act of government deficit spending, job creation, and economic stimulus in American history. At the peak of the war effort, the deficit was 26 percent of GDP, and the unemployment rate fell below 2 percent, washing away the damage down by the Great Depression.

But for the last 30 years or so, the economy's ability to heal on its own has all but disappeared, largely because of bad policy decisions. The rise in deficit spending in more recent decades is a symptom of that: The problem hasn't been too much deficit spending; it's been not enough.

As the mid-century also showed us, something important happens when there are so many jobs that employers are competing for workers rather than vice versa. By removing the threat of being left without a job, it gives workers power to demand better wages and benefits, better jobs, better working conditions, and to influence the terms of the employment.

A balanced budget amendment would place that state of affairs permanently out of reach.

It would also condemn the government to sit idly by, regardless of what ups or downs the economy goes through. Every time tax revenue went down, we'd have to slash spending — at the very moment we need more spending to stimulate the economy.

A world in which the U.S. government was constitutionally required to balance its budget every year would be a world with much worse recessions. Recoveries would be agonizingly slow, and there would never be enough jobs for everyone. A balanced budget amendment would guarantee that the unbelievably high levels of unemployment and economic dislocation for black Americans and other racial minorities would grind on in perpetuity. It would condemn all workers to live in constant fear of falling into the pool of unused surplus labor, and thus never fight for a better life.

It's a monumentally irresponsible and destructive idea.