“When wealth,power, and media are monopolized by a minority, how can they speak about freedom and justice? The capitalist systems can never grant freedom and justice.”

Although this maxim is associated with Wiesenthal (e.g. "Honoring Simon Wiesenthal", Congressional Record—House, Vol. 151, Pt. 15, 21 September 2005, p. 20804), he did not originate the quote, which appears in the context of the labor movement in the 19th century (e.g. Alexander Spencer, "Maintain Your Union", The Typographical Journal, Vol. 10, No. 7, 1 April 1897, p. 266).
Misattributed

2000s, 2004, Speech to United Nations General Assembly (September 2004)

2013, Brandenburg Gate Speech (June 2013)
Context: But the fact that we can stand here today, along the fault line where a city was divided, speaks to an eternal truth: No wall can stand against the yearning of justice, the yearnings for freedom, the yearnings for peace that burns in the human heart.

2013, Cape Town University Address (June 2013)
Context: We always have the opportunity to choose our better history. We can always understand that most important decision -- the decision we make when we find our common humanity in one another. That’s always available to us, that choice. [... ] it can be heard in the confident voices of young people like you. It is that spirit, that innate longing for justice and equality, for freedom and solidarity -- that’s the spirit that can light the way forward. It's in you.

Variant: Nobody can give you freedom. Nobody can give you equality or justice or anything. If you're a man, you take it.
Source: Malcolm X Speaks: Selected Speeches and Statements
Source: Malcolm X Speaks (1965), p. 111

"Historical Murder", as translated by Anthony Bower
The Rebel (1951)

Source: From Freedom to Slavery (1996), Ch. 6 : The New King : Tyranny of the Corporate Core, p. 90