Summarized (per hombre_fatal's request):
For over 80 years, U.S. government policies have protected domestic sugar production, resulting in elevated sugar prices and an annual cost of $1.4 billion to consumers (as of 2013). These higher prices, combined with federal support for corn production, have fueled the widespread use of high-fructose corn syrup (HFCS) as a cheaper alternative. HFCS production is driven by advanced technology and heavy corn subsidies, allowing it to dominate processed foods and beverages. The rise in HFCS use and overall sweetener consumption has contributed to increased intake of "empty calories," linked to obesity.
Efforts to address the issue include taxes on sugar-sweetened beverages (SSBs) aimed at reducing consumption and funding nutrition education. However, these taxes face challenges, such as consumer compensation by shifting to other high-calorie foods and lack of evidence on long-term impacts on obesity. Nutrient-specific excise taxes at the point of purchase are hypothesized to be more effective.
Additionally, U.S. sugar prices surged during 2009-2012 due to global weather-related production declines, but HFCS remained a slightly cheaper option. HFCS's affordability is rooted in subsidized corn production, which also benefits livestock industries by reducing feed costs.