This chapter studies the golden years of the PSBR and how this facilitated the rise of neoliberal policy languages. The PSBR acquired magnetic features for policy debates after a combination of government strategic ambiguity, unfavorable international comparisons, erratic forecasting, and weaponization by different actors boosted its salience and left it at the center of national framing contests about the impact of economic policy on, for example, inflation, industrial investment, economic growth, the balance of payments and macroeconomic stability more generally. The chapter first looks at how the 1974-1979 Labour governments lost control of the terms of public economic policy debate and the PSBR became the centerpiece of public economic policy debate despite government elites’ reframing attempts. The government ended up elevating the PSBR to the status of official fiscal policy indicator even if it had not been devised for such purpose and government elites had explicitly discouraged its use for demand management appraisal. The chapter then traces how the PSBR became the deliberate cornerstone of economic policy during the 1980s Conservative governments.