Le Châtelier's principle principle states that when a system in equilibrium is disturbed the system acts in a way to annul the effect of the disturbance

A system (government) in financial equilibrium

Is a society where there are little poor, little rich and a lot middle class. Number of poor is little but usually 5 times more than the number of rich. Here I will consider only financial disturbance that is affecting the equilibrium in the society (government).                                                                                                                                                                                                                                                               

Disturbance in equilibrium-1

When a system has many rich people compared to poor people, society is disturbed because it can not sustain as it is. There is not enough input (poor ppl working either below basic salary or just at basic wages) for wealth generation. In this situation Rich ppl are looking for poor ppl/slaves by colonising other countries welcoming illegal immigrants (yes illegal). Present day equivalence of immigrants (legal or illegal) who are ready for working at or below basic ages.

 Also many ppl think that illegal immigrants are problem in US. Big companies don’t want to solve this problem because majority of illegals work below basic salary generating vast amount of wealth foe Big companies. Because of this only during election time it is an issue.

Disturbance in equilibrium-2

When society has many poor ppl this is also disturbance it will tend to move forward (poor ppl demanding more economic rights, political rights, jobs) leading to revolution. In history many religious fanatics, Individual dictators, communist have used this opportunity for revolution.

At present equilibrium in American society is disturb a bit in first time, ( moved to left) so the system is trying to balance this equilibrium by moving forward , it is demanding the free health care/free college so the equilibrium is maintained. And this is Bernie Sanders movement

This disturbance in equilibrium has created  more poor ppl. If many poor ppl get free college and free health care they will move towards middle class and equilibrium is balanced again.

This disturb in equilibrium has created Bernie Sanders movement.

By the way nothing is free even they say it is free. Just mode of payment is different. What Bernie is asking is different way of paying health care and education where rich ppl pay more for the  same product