Going back to the original post, it might be a good idea to correct the Shakespeare quote:
'From too much liberty, my Lucio, liberty: As surfeit is the father of much fast,'
The abbreviated quote suggests that liberty has some relationship with surfeit. Not quite what was said.
The quote is meaningless without the 'too much'.
So what is said is that in the society under discussion the speaker believes there is too much liberty. He then compares the situation to the concept of excess (food perhaps?) will lead to a loss of appetite following the excess.
Hope that helps.

However, the comments of a fictional character in an entertainment have as much relevance to a discussion as a comedian's catchphrase, no what I mean?

Stu