I think the deck is stacked in many respects. However, we have choices and ways we can weave around the things that try to make us powerless. Also the deck chairs can be shuffled. An example is my hometown. For 75 years, the owners of the local newspaper exerted tremendous power in picking city council members, congressional representatives and so forth. A super conservative and wealthy family, they controlled the city from the ground up. However, with the drastic decline in newspaper readership, they have lost a great deal of their power and influence, and consequently, new and different opposing political figures have appeared on the scene and have done well.
At the moment, the Koch brothers exert influence over the national political scene way beyond what their considerable fortune would dictate. This is because of their single-mindedness. They have enlisted support from other super-wealthy conservatives (something called the Koch Network) and have formed groups like ALEC, which writes conservative legislation for state governments and ships it all over the country. Charles and David Koch have been involved in, and have provided funding to, a number of other think tanks and public policy organizations: They provided the initial funding for the Cato Institute, they are key donors to the Federalist Society and they also support, or are members of, the Mercatus Center, the Institute for Humane Studies, the Institute for Justice, the Institute for Energy Research, the Heritage Foundation, the Manhattan Institute, the Reason Foundation,[ the George C. Marshall Institute,] the American Enterprise Institute, and the Fraser Institute,and the Foundation for Accountability and Civic Trust.
However, Charles Koch is 84, and David Koch is 79. David Koch is ill and won't be active in political stuff much longer. Though their institutions and friends will continue to inflict damage on our democracy and our society for decades to come, none of them have the single-minded focus of these brothers, and I suspect, with loss of the major influence of funding, will begin to bicker with one another.
Our country is definitely a plutocracy at this point (and may have always been). However, in times of severe economic crisis, (the great Depression is an example), a sort of populism arises which reins in the power of the plutocrats a bit. They are experts at manipulating public opinion, but when people are starving, they tend to notice which people are well-fed and pay more attention......