Democratic polities often struggle to build consensus on defence spending when security imperatives collide with domestic political divisions. Examine this with reference to Taiwan's Legislative Yuan debates (2025–26).

Defence budgeting in a democracy is a bargain between existential threat perception and the legislature's power of the purse. Taiwan's 2025–26 standoff — where President Lai Ching-te's USD 40 billion special defence proposal was cut to NT$780 billion (~USD 25 billion) [1] — shows how divided government can dilute, though not defeat, a security imperative.

The security imperative

• Proximity of threat: sustained PLA exercises around the island and intelligence assessments of a "2027 capability window" pushed Taipei toward urgent rearmament [3].
• External pressure: US insistence that partners self-fund defence, mirroring the NATO GDP benchmark, framed Lai's target of 3.3% of GDP in 2026 rising to 5% by 2030 [3].
• Procurement urgency: the December 2025 US package — HIMARS, Javelin and TOW missiles, M109A7 howitzers, anti-armour drones — required legislative appropriation to be executed [1].

The domestic political collision

• Divided government: a DPP executive facing a KMT–TPP legislative majority; the Legislative Yuan's control of the purse turned the bill into a confidence test rather than a threat assessment [3].
• Ideological divergence: DPP favours deterrence through US alignment; KMT prefers engagement with Beijing and called the original outlay fiscally reckless [3].
• Rival numbers: against the executive's NT$1.25 trillion, the TPP tabled NT$400 billion and KMT NT$380 billion, converging at NT$780 billion [1].
• Governance inversion: the bill passed 59–0 with 48 abstentions, the ruling party withholding support from its own priority as insufficient [1] — consensus by arithmetic, not agreement.

Ethical–institutional dimension Legislators owe a duty of care on national survival, yet partisan advantage competed with it. Compounding this, Taiwan's security rests on the US Taiwan Relations Act, 1979, a domestic American statute enabling arms sales without a defence guarantee [2], leaving deterrence hostage to another polity's politics.

Taiwan's experience shows democratic contestation delays and trims defence outlays but ultimately legitimises them — money voted by a hostile legislature is politically durable. The lesson for democracies, India included, is to insulate long-cycle capability planning through bipartisan standing mechanisms and multi-year appropriations, so that scrutiny strengthens deterrence rather than deferring it.