I'd say its a pricing problem.
Right now 'The Wolf of Wall Street' is available from Amazon Instant Video at $20. On your popular torrent site virtually the same product is available for $0 + (riskOfGettingCaught * $1,000,000 fine) = $0.000001 ?
You can either try to increase the riskOfGettingCaught or decrease the legal price.
I think the industry should do what Hulu has done over the past 5 years. Give the product away virtually for free, collect an enormous user base while you starve/kill the demand for the equivalent torrents, slowly increase the price of the service until you find equilibrium, then profit.
But hey, maybe piracy isn't really a problem? The greatest assumption people make is that because someone downloaded a movie illegally they were willing to buy it for $20. Which is false. I'd have to imagine that selling 'The Wolf of Wall Street' for $20 on Amazon is more profitable than selling it for say $19 and capturing a few pirate consumers.
But I wonder if theres a number between $0 and $19 that captures enough of the piraters to be more profitable than $20?