Truth has become such a valuable commodity that the government is economizing it!
Liars, meaning good convincing liars (i.e. sociopaths, who evince no guilt when they lie) , lie because they are able to get what they want from people, especially if those people are conditioned from childhood to tell and to believe that others will tell the truth.
It may seem that I am stating the obvious, but the point I want to make is that all ruling power is, is the willingness and ability to do things the ruled may not, or have been conditioned to believe they cannot do.
You are taught not to steal, yet government reserves to itself the right to steal, obfuscating the theft with words like excise, confiscation, pillage, taxation, and in the extreme, conquest.
You are taught not to murder, yet government reserves to itself the right to murder, obfuscating the killing with words like capital punishment, assassination, terminate with extreme prejudice, and in the extreme, war.