Our economy has already been hijacked. The democratic socialist movement wants to take that control back. It's easy to stop corruption in our political system. You just make sure they don't have the money in the first place.
Also how about all of the capitalist countries that are failing? India, Hong Kong, Russia, Honduras, Somelia Nope, none of them are examples like Venezuela
What I really want you to understand is that corruption is not exclusive to either socialism or capitalism. What will determine success is how much of that corruption effects the systems intent. Once you diminish the factor of corruption, socialist policies kind of dominate across the board. And we'd still have a free market.