The decision to merge the Railway Budget with the General Budget, implemented from the financial year 2017-18, marked a significant reform in India's budgetary process, ending a 92-year-old practice that began in 1924 based on the Acworth Committee recommendations. This merger was primarily driven by the recommendations of the NITI Aayog and aimed at bringing about several merits for both the Railways and the overall economy.

Here are the key merits foreseen from this merger:

1. End of Political Populism: The separate Railway Budget often became a platform for political populism, with successive railway ministers announcing new trains, routes, and projects based on political considerations rather than economic viability or operational necessity. The merger helps depoliticize railway finances, allowing for more rational and economically sound decision-making regarding investments and expansion.

2. Enhanced Financial Flexibility and Capital Expenditure: By merging with the General Budget, the Railways gain access to the General Exchequer for capital expenditure. This reduces their reliance on market borrowings and internal resource generation, which were often insufficient to fund large-scale modernization and expansion projects. This flexibility allows for greater investment in critical infrastructure, safety upgrades, and technological advancements, which are vital for the Railways' long-term health and efficiency.

3. Improved Financial Health of Railways: The Railways are relieved of the obligation to pay an annual dividend to the General Revenues for the capital invested by the government. This significantly improves the Railways' balance sheet, allowing them to retain more of their earnings for reinvestment in their own operations, maintenance, and development projects. It also helps in reducing their accumulated debt.

4. Holistic Transport Sector Planning: The merger facilitates integrated planning for the entire transport sector (rail, road, air, and waterways) as part of the national infrastructure strategy. This allows for a more comprehensive and coordinated approach to infrastructure development, avoiding siloed planning and ensuring optimal allocation of resources across different modes of transport based on national priorities.

5. Simplified Budget Presentation and Parliamentary Time Saving: Presenting a single Union Budget simplifies the overall budgetary process. It saves parliamentary time that was previously dedicated to a separate discussion and approval of the Railway Budget, allowing for more focused debates on broader economic and social issues.

6. Focus on Core Operations and Efficiency: With the financial burden and political pressures reduced, the Railway Ministry can now focus more on its core functions: improving operational efficiency, enhancing safety standards, modernizing services, and improving passenger experience and freight logistics. This shift in focus can lead to better service delivery and increased competitiveness.

7. Better Resource Allocation: The merger enables a more optimal and strategic allocation of national resources across various sectors, including infrastructure. Decisions on railway investments can now be made in conjunction with other national priorities, ensuring that funds are directed where they can yield the maximum economic and social benefit.

In essence, the merger is a significant reform aimed at modernizing Indian Railways, improving its financial viability, and integrating it seamlessly into the nation's overall economic and infrastructure development agenda. While some concerns about reduced parliamentary scrutiny of railway finances were raised, the overarching benefits of financial flexibility, rational decision-making, and integrated planning are expected to contribute significantly to the Railways' growth and the nation's progress.