King was murdered by that system at least partially for those beliefs.
And that was before the Reagan giveaway, the conversion of the Corporate party's former opposition party's conversion into bribe taking neoliberals, and the icing on the cake of hopelessness, Citizens United which effectively made political bribery legal. The power King was speaking against has gotten much more powerful since that power ended his life.
This system needs to be destroyed and a new one rebuilt in its place. We can suffer the pain of that, or the generationial pain of subsistence until inevitable collapse under the weight of our own market capitalist con game having nowhere left to metastasize. Pain either way, but I'm guessing we'll keep passing the buck because that's the path of least resistance.