American Corporate Departmental Cartelization and Anti-Trust

If all the corporations in America "out-sourced" their personnel departments into one, wouldn't that be an anti-trust violation? even if instead of one it was just two or three?


If all the corporations in America "out-sourced" their credit departments into one, wouldn't that be an anti-trust violation? even if instead of one it was just two or three . . . ?


Bonus question: If an American corporation has been allowed to become "too big to fail", isn't that clearly an anti-trust violation?


Keywords: anti-trust, (over)concentration of wealth and power, plutocracy