The U.S. Supreme Court case Helvering v. Butterworth et al., Trustee, in 1933 revolved around the issue of tax liability for a trust fund's income. The respondents were trustees of a fund created by an individual who retained the power to revoke or modify it at any time during his lifetime and also had the right to receive its net income annually until his death or earlier termination of the trust. The Commissioner of Internal Revenue argued that under Section 219(h) and (i) of the Revenue Act, this made him liable for taxes on said income as if he was still in direct possession thereof - essentially treating it as part of his gross estate. However, upon reaching court, Justice Cardozo delivered an opinion stating that these sections did not apply since they only covered cases where transfers were intended to take effect after death; whereas here, transfer took place immediately upon creation with no stipulation about post-death effects. Thus, despite retaining certain powers over it including receiving annual net income from it till death/termination - which could be seen as indirect control - he wasn't considered owner anymore so couldn't be taxed like one. This ruling clarified how trusts are treated under tax law and set precedent regarding taxation based on ownership versus control.

In the dissenting opinion for Helvering v. Butterworth, Justice Cardozo disagreed with the majority's interpretation of tax law and its application to trusts. He argued that a trust should not be considered as an entity separate from its beneficiaries when it comes to taxation. According to him, income generated by a trust should be taxed directly in the hands of beneficiaries rather than at the level of the trust itself. This view was based on his understanding that Congress intended for taxes to apply where income is enjoyed and consumed, which in this case would be with individual beneficiaries rather than impersonal trusts. His argument essentially centered around fairness and economic realities over legal formalities or structures used primarily for tax avoidance purposes.