The authors criticize the main idea of the paper by E. Gaydar and V. Mau (VE, 2004, No 5, 6) concerning the possibility of partial utilization of Marxian ideas in the framework of the liberal doctrine and formation of "liberal Marxism". The thesis that the revolutionary conclusions of Marxism are directly connected with its theoretical foundations is argued in the article. The necessity to correct some initial Marxian concepts caused by changing facts of real life doesn't lead to the negation of his fundamental ideas. On the contrary such corrections form the possibility to underpin the theoretical grounding under the revolutionary potential produced by contradictions of modern capitalism entering the epoque of the post-industrial society and globalization.