This work initiates a crucial discussion on the Decision-Making Mechanisms for the Expansion of the Argentine Electrical System. A proposed mechanism aims to reduce uncertainty, enhance institutional transparency, and provide a standardized, economically justified approach to decision-making, focusing on factors like capital costs, operational considerations, and potential future externalities such as emissions taxes. In the context of a global energy transition, this work underscores the importance of addressing energy security and climate change, emphasizing the role of electrification in reducing carbon emissions and contributing to broader environmental goals. This work examines Argentina's current decision-making methodology for electrical expansions, evaluating its impacts and appropriateness within the outlined context. Additionally, a review of existing technical tools is undertaken, assessing their suitability for the planning objectives. This work concludes with a recommended decision-making mechanism and tool tailored to Argentina's needs. It highlights the opportunity for the country to demonstrate regional leadership in addressing the climate crisis.