Public Sector Undertakings (PSUs) were established in India with a grand vision, particularly during the Nehruvian era, to occupy the 'commanding heights' of the economy. This philosophy stemmed from the belief that state control over key industries like heavy manufacturing, infrastructure, and strategic sectors was essential for rapid industrialization, equitable distribution of wealth, and achieving self-reliance. PSUs were seen as instruments of national development, employment generation, and regional balance, filling gaps where private capital was either scarce or unwilling to venture.

The 'Commanding Heights' Era (1950s-1980s): In the initial decades post-independence, PSUs played a crucial role in building India's industrial base. They were instrumental in establishing core industries such as steel, coal, power, oil, and heavy engineering. The government's rationale was to prevent concentration of economic power in private hands, promote social welfare, and ensure planned economic development. PSUs were often characterized by large investments, significant employment, and a focus on social objectives alongside economic ones. However, over time, many PSUs began to face challenges such as bureaucratic inefficiencies, political interference, lack of accountability, technological obsolescence, and mounting losses, becoming a drain on public exchequer.

Shift Towards Disinvestment (1990s onwards): The economic reforms initiated in 1991 marked a significant paradigm shift. Faced with a severe balance of payments crisis and the realization that PSUs were often inefficient and unprofitable, the government began to move away from the 'commanding heights' philosophy towards liberalization, privatization, and globalization (LPG). Disinvestment, which involves the sale of government equity in PSUs, emerged as a key policy tool. The objectives of disinvestment evolved over the years:

1. Initial Phase (Early 1990s): Primarily aimed at raising resources to bridge the fiscal deficit and reduce the public debt. The sales were often minority stake sales, retaining government control.
2. Strategic Disinvestment (Late 1990s - Early 2000s): This phase saw a more aggressive approach, including strategic sales where the government sold a majority stake along with transfer of management control to private entities. The goal was to improve efficiency, infuse technology, and unlock the true potential of these enterprises. Examples include VSNL, BALCO, and IPCL.
3. Mixed Approach (2000s - 2010s): Subsequent governments adopted a more cautious approach, often preferring minority stake sales through public offerings (IPOs/FPOs) to raise resources while retaining majority ownership. The focus was also on listing more PSUs to enhance transparency and market valuation.
4. Recent Trends (2014 onwards): The current government has renewed emphasis on strategic disinvestment and privatization, aiming to exit non-strategic sectors and reduce the government's presence in business. The goal is not just revenue generation but also to promote private sector efficiency, innovation, and competition. The creation of a separate Department of Investment and Public Asset Management (DIPAM) underscores this commitment. Major privatization drives have been announced for companies like Air India (successfully privatized), BPCL, and others.

Critical Examination of the Change: The shift from 'commanding heights' to disinvestment reflects a fundamental change in India's economic philosophy. While the initial vision of PSUs was noble, their performance often fell short due to structural and operational issues. Disinvestment, when executed transparently and strategically, can bring several benefits: reducing the fiscal burden, improving efficiency and competitiveness of enterprises, attracting private investment, and freeing up government resources for social sectors. However, concerns persist regarding the valuation of assets, potential job losses, loss of public control over strategic sectors, and the possibility of creating private monopolies. The challenge lies in balancing economic efficiency with social equity and ensuring that the process is fair, transparent, and serves the broader national interest, rather than merely being a revenue-generating exercise.