Acting in concert

In HLB Smith Holdings Limited v R, 2018 TCC 83, each of Holdco and a family trust (“Trust1”) held 50% of the shares in the capital of Opco. Another family trust (“Trust2”) held all of the issued shares in the capital of Holdco. Trust1 was for the benefit of W’s family; it appears Trust2 was for the benefit of M’s family. W and M were unrelated. They were the directors of Opco at all times. Opco paid dividends to its shareholders at a time when it owed income tax. Holdco paid dividends to Trust2, which allocated the dividends to M and his wife. Were the recipients of the dividends liable under section 160? Put another way, did Opco deal at arm’s length with its shareholders, who were unrelated to it?