'Too permissive' merger rules eyed for reform

Treasurer Jim Chalmers has raised concerns that Australia's control of mergers may not be adequate. (Darren England/AAP PHOTOS)

Companies could be subject to tougher anti-competitive merger laws under possible reforms floated by the federal government. 

Australia's consumer watchdog has been pushing for stronger rules so it can prevent companies from joining forces if there's a risk firms will then gain too much market power.