And yet even in the very days of the prophets, even with their own consent, the first concession to this later tyranny was made. It was made when the Constitution was made; and the Constitution was made chiefly because of the demands of Commerce. Thus it was at the outset a merchant's machine, which the other interests of the country, the land and labor interests, even then foreboded would destroy their liberties. In vain their jealousy of its central power made enact the first twelve amendments. In vain they endeavored to set bounds over which the federal power dare not trench. In vain they enacted into general law the freedom of speech, of the press, of assemblage and petition. All of these things we see ridden roughshod upon every day, and have so seen with more or less intermission since the beginning of the nineteenth century. At this day, every police lieutenant considers himself, and rightly so, as more powerful than the General Law of the Union. - Voltairine de Cleyre, Anarchism & American Traditions
She, along with other American anarchists, and contrary to most European-influenced anarchists who tended to be anti-propertarian, saw that a free market and propertarianism were profoundly anarchist.
Anarchism declares that private enterprise, whether individual or cooperative, is equal to all the undertakings of society. And it quotes the particular two instances, Education and Commerce, which the governments of the States and of the United States have undertaken to manage and regulate, as the very two which in operation have done more to destroy American freedom and equality, to warp and distort American tradition, to make of government a mighty engine of tyranny, than any other cause, save the unforeseen developments of Manufacture. - Voltairine de Cleyre, Anarchism & American Traditions
The main problem with the economy according to de Cleyre was size - things were too big, centralized, and bloated. In a free market, i.e. without government monopolies and intervention, she saw economies of scale largely disappearing. There would be more goods produced on a small scale and distributed locally. She anticipated the "small is beautiful" ideas of Leopold Kohr.