Complex sentence: Ever since the birth of the organized labor movement economic disputes have spilled over into the legal system, frequently as part of employer or government desire to terminate labor disputes or to punish alleged malefactors for physical violence or property damage resulting from such turmoil.
Split into simpler sentences: Ever since the birth of the organized labor movement, economic disputes have been contested in the legal system. In some cases, an employer or government has gone to court to achieve termination of strike actions, or to seek prosecution for alleged malefactors for physical violence or property damage resulting from such turmoil.