Should It Be Illegal for Prosecutors to 'Flip' Witnesses?

Been on vacation in Mystic Connecticut, visited family and enjoyed the cool breeze of Long Island Sound.
Since returning I've been watching some video about sovereign citizens, for the most part they are people who do not respect the right of any civil authority or law. Some police in those videos identify persons holding strict adherence to constitutional rights and U.S. Code as sovereign, when in fact it is the police who are acting as sovereigns. Police regularly ask and deceive citizens to yield constitutional rights, under the premise of public safety, and frankly as the quickest means to an end. Here Mr. Dershowitz describes how prosecutors act as sovereigns by ignoring U.S Code and offering benefits to witnesses. It happens every day and on many levels.

Should It Be Illegal for Prosecutors to 'Flip' Witnesses?: It is already illegal for a lawyer to offer a witness a valuable consideration for providing testimony -- if the lawyer is a defense attorney. If any defense attorney offers a witness an inducement to testify favorably to his client...

I am not suggesting that this practice change wholesale, only a fool would expect such a radical change. Sentence leveraging on witnesses is an integral part of convicting criminals. Leveraging should only be allowable when used in support of physical evidence and when directly tied by the primary criminal act . With the Mueller investigation into Trump, direct ties are absent, proof of a crime is absent, there is no evidence linking the President to even unethical behavior relating to the Russia collusion accusations. Yet we have prosecutor, by U.S. Code breaking the law, using crimes unrelated to the President as leverage to extract favorable testimony. There is a strong impulse on the investigation's part to suborn perjury by threatening incarceration.
People may hate this President, his combative nature is foreign to the political norms. The fact that people do not like the man is not reason enough to fabricate issues that might lead to calls for impeachment.
Very much enjoy the work of Mr. Dershowitz lately.