If the foreign adversaries and competitors of the United States imagined a future that would fulfill their most ambitious objectives, it might begin with a government crippled by the House Republican leadership’s “Ryan budget” released on Tuesday. Followed to its absurd conclusion, this document would lead America toward a withered state, approaching the point where Marxian dreams and Randian dogma converge.

Or at least that’s the view suggested by the sober analysts at the Congressional Budget Office, whose report on the Ryan budget shows debilitating cuts to nearly every department of government today, from law enforcement and border patrols to scientific research, food safety, environmental protection, federal highways, national parks, weather monitoring, education and all the other essential functions of a great country. There would not be much left for Medicare and Medicaid, either. Social Security would continue in some form, and defense — of course — would increase.

But in a nation stripped of science and infrastructure, with a people demoralized by insecurity, unemployment and inequity, exactly what would be left to defend?

Certainly Ryan and his Republican colleagues will deny that their new budget — like their old budget — would cripple the federal government and render the United States unrecognizable over the coming decades, if implemented. Yet the calculations released by the CBO, a nonpartisan arm of the Congress, permit no other conclusion.

Prepared at the request of Ryan, the Wisconsin Republican who chairs the House Budget Committee, the CBO report indicates that by 2050, federal spending on all functions — except Social Security, health programs and interest payments — would account for no more than 3.75 percent of gross domestic product. On defense alone, however, we have never spent less than 3 percent of GDP during the past 70 years or so; and during those same years, we have spent no less than 8 percent of GDP on all those functions, including defense. Which means that should Pentagon spending increase drastically, as both Ryan and likely Republican nominee Mitt Romney insist it should, there will be nothing left for anything else.

“The rest of government would literally have to disappear,” as the Center on Budget Policy and Priorities explains dryly. Is it necessary to recite the details, even in broad outline? No more basic research and no more support for technological progress in defense, communications, medicine, manufacturing, energy or education. No more health care, secondary education or vocational training for veterans. No more reconstruction of decaying roads, bridges, airports, waterways, tunnels, seaports or any other infrastructure that states cannot afford to rebuild on their own. No more national parks, which presumably will be sold off to oil companies, resort developers and other commercial predators. No more oversight of the purity of food and drugs, whether domestic or imported. No further enforcement of the environmental statutes that have restored clean air and water in so many places across the country. No more Federal Bureau of Investigation, no more Immigration and Customs Enforcement, no more Department of Homeland Security, no more federal justice system at all. And very little health care, which would be cut by as much as 75 percent, leaving tens of millions without insurance coverage.

Is all this starting to sound slightly weird? That is certainly one way to describe the Ryan budget, which evokes the utopian fantasies of both Karl Marx, who predicted the “withering away of the state” after communism, and Ayn Rand, whose hatred of modern government inspired anarchist (or “minarchist”) fantasies among many of her admirers. What is truly bizarre is to watch a major political party produce such a document not once but twice — and then to hear this absurd exercise hailed by venerable Washington commentators as “bold” and “patriotic.”

Joe Conason is the editor in chief of NationalMemo.com.