For quite some time now we have all seen the slow deterioration of the US middle class, the gap between the top 1% and everyone else is rising by the day! They seem to be attacking any group that gives the upper hand to the middle class and removing any system (higher taxes for the rich.....) that was there to protect this previously thriving class!
The cash cow they used for decades to empower the 1% has outlived it's usefulness and now is becoming a drain on their resources. It is the financial equivalent of winning all the money in the poker game and the leaving before giving anyone a chance to win back some money.
I would argue that the US government is not trying to kill the middle class so much that it is trying to strengthen the billionaires who have control over it. No one is trying to actively destroy the middle class but the greed inherent to our system combined with the massive influence of the 1% is causing the unintended side effect of squeezing out the middle class.