lose the MLK reference, starting your speech off by quoting a better speech (possibly the best of all time) is only going to draw attention to your deficiencies as an orator
also like chris said, yeah you're retarded
Your speech would be much better if it actually presented solutions to the issues. MLK's argument is purely an argument from morality, which just requires a change in people's behaviour. Maybe I'm just being a pessimist and not seeing it, though.
I would change the subject and talk about something else. The topics don't cross over well, as economic issues are way more complex than just telling 'the mean corpo guys to stop'. My advice would probably be to switch over to talking about other heuristic biases humans have based on physical qualities. That would align more with MLK's own speech better. Maybe instead of race talk about how differently people are treated for other intrinsic qualities, like being a man or a woman, or discuss issues on oversexualisation or something. That would align better with the spirit of the original.