Societies exist because human beings fare better by cooperating in groups. Human societies have ranged from loose groupings of individuals to grand empires, but one of the distinguishing features of most, if not all, successful nations and empires is that they have adopted structures and laws that strike a balance of some sort between the rights of the individual and the need to maintain civic order while protecting their citizens from attack from without.
There are essentially two ways to hold a country/society together, either through laws based on honesty and public trust of the government or through fear and force. And even societies based on honesty and public trust use fear and force on lawbreakers and other disruptive elements to deter them from harming others.
But the greatest danger to successful societies usually results from corruption from within. Corruption can be loosely defined as breaking in some fashion social compacts or laws that maintain equal rights to personal safety, equal rights to hold and use property, equal access to public services, and equal treatment under law.
Failing to pay taxes is corruption because the evader obtains public services he did not pay for, and thus places a heavier burden on those who do. Bribing a public official for services or contracts disadvantages others (and results in unequal treatment under law) and possibly results in shoddy procurement/goods. Paying to get a government position almost invariably results in a less qualified person in that position… and also reduces faith in government. Less faith in government creates more incentives to cheat government and the mindset that “if everyone else is doing it, why shouldn’t I?”
By the same token, government policies that appear to grant special rights and privileges to certain groups or classes of people also reduce trust in government, even if such policies actually make access more equal.
Now, in practice, all societies have a degree of corruption, but history shows, rather conclusively, that comparatively more honest societies actually achieve more, have greater power, and have happier and more prosperous people.
A society that accepts corruption as a way of life deserves what it gets, and it will continue to get it, because corruption stems from the idea that whatever’s best for me and my family supersedes the rule of law, and when people don’t respect the law, corruption becomes endemic and self-perpetuating.