Marx continues to be vindicated by the passage of time. A truly democratic society requires truly democratic control of society, and the base of society is the Mode of Production. Ergo, public ownership and planning is a necessity for the voice of the people to be heard and implemented, private property stands directly against the establishment and realization of this voice. I made an intro to Marxism reading list if you want to know more, also accepting feedback on it!
An economy's purpose is to be a lowly tool in service to a society, a mechanism meant to maximize the efficient and equitable distribution of goods and services within a society for the benefit of the society.
The modern, unchecked, crony market capitalist economy has turned that on its head through governmental capture and media propaganda. Our society now lives in subsistent servitude to our economy, which is a total perversion of the entire point of what an economy's purpose is.
The tail is wagging the dog. The people are the point, even if we've been brainwashed into seeing GDP as the point. Ask our massive homeless population if our economy's quarterly growth/metastasis results keeps them warm at night or relieves their hunger.