In addition to Havel's greengrocer, I've recently come across these, all of which feel on point as to why preference falsification and other pressures enforce silence for fear of loss of livelihood despite the loss of our freedoms.
G B Shaw: “While our constitution was set up to prevent political dictatorship, in doing so, we established a society where every ward boss is a dictator, every financier a dictator, every private employer a dictator, all with the livelihood of the workers at their mercy.”
Adlai Stevenson 1952: "The tragedy of our day is the climate of fear in which we live, and fear breeds repression. Too often, sinister threats to the bill of rights, to freedom of the mind, are concealed under the patriotic cloak of anti-communism."
[The last part could be updated to current circumstances and be under the cloak of #BeKind with the penalties of re-education for wrong think.]
Learned Hand: "Liberty lies in the hearts of men and women; when it dies there, no constitution, no law, no court can even do much to help it. While it lies there it needs no constitution, no law, no court to save it. And what is this liberty which must lie in the hearts of men and women? It is not the ruthless, the unbridled will; it is not freedom to do as one likes. That is the denial of liberty, and leads straight to its overthrow. A society in which men recognize no check upon their freedom soon becomes a society where freedom is the possession of only a savage few; as we have learned to our sorrow."
https://www.thefire.org/research-learn/spirit-liberty-speech-judge-learned-hand-1944