Karl Marx was a man of the 19th Century. As such, his philosophical and economic models are less refined than later thinkers who had the benefit of more historical experience, While it is probably impossible to drag Democratic Socialist politicians (Bernie Sanders, ¡Ocasio! She Guevara, etc.) into the 21st Century, perhaps they can be induced to consider basing their programs on the work of 20th-Century Marxists.
In one sense, they already do. They keep wanting to try the same failed “solutions” to nonexistent problems. That strategy models Chico’s economic behavior; he squandered his earnings and kept betting on the wrong horses. Clearly, Groucho’s approach was better. His cheerfully irreverent approach to the facts (“How the elephant got in my pajamas …”) and willingness to deal with them usually led to desirable outcomes.
However, the correct model for them is Harpo. They should just shut up and let us laugh at them.