As the U.S. Supreme Court once put it, the Anti-trust laws are "a comprehensive charter of economic liberty aimed at preserving free and unfettered competition as the rule of trade." The first and most important of these laws was the Sherman Antitrust Act, which Congress passed in 1890 to reduce the market power of the large and powerful "trust" that were viewed as dominating the economy at the time.
Mr. Jang and his partners can help you measure and compare the social benefit from synergies to the social costs of reduced competition and help government recognize it to be more efficient also.
But Trust is not always undesirable. Sometimes companies merge not to reduce competition but to lower costs through more efficient joint production. If antitrust laws are to raise social welfare, the government must be able to determine which mergers are desirable and which are not.