There will be no martial law or widespread protests for the same reason there won’t be any Tea Party uprising - people are comfortable, fed, and entertained.

Now, that said, I saw recently that for the first time, the wealth distribution in the US is fully bimodal - a huge number of very poor, and a few very, very rich. The middle class is virtually nonexistent. It’s so striking that companies that have traditionally marketed to the middle class (Proctor and Gamble, etc.) are having to change their strategies to market to the very poor, while others are going out of business or changing to market boutique-like to the ultra rich. This is the same sort of wealth distribution you see in Mexico and other ‘poor’ countries.