What a weird thing to attribute to capitalism. Capitalists are all for resources they can take and not pay for. Capitalist software companies were the inventors of the "AS IS" EULA which is long since become industry standard. Capitalist software companies are the first to insist they owe the user nothing - and half that if the user isn't even a customer.
Honestly, I think that demand you speak of is an upwelling of the outrage of users, including corporate users, who have been treated by corporate software vendors as if they are owed nothing by the companies that have taken their money for software - and are catching open source with the tar of a broad brush.