Labour retains Makerfield in the by-election but its vote share falls by more than 10 percentage points relative to its 2024 general election result, with Reform UK finishing second — constituting structural erosion rather than a protest dip.

Four independent frameworks converge on the same two-part directional prediction (retention + >10pp decline), which is an unusually strong cross-paradigm signal. The Marxist frame identifies the structural mechanism: social wage compression via Winter Fuel Payment removal and benefit freezes directly reduces working-class reproduction costs, generating material antagonism that is ideologically displaced toward Reform UK via the grief-palimpsest mechanism. The Institutionalist frame confirms the timing: Reform UK has crossed the credibility threshold that UKIP took a decade to reach, lowering the transaction cost of switching so that today’s erosion is institutionally locked in, not contingent. The Keynesian frame grounds the prediction in observable macro conditions: CPI re-acceleration and real income compression in a constituency structurally dependent on public wages and transfers produce a textbook animal spirits collapse. The Austrian frame explains why Labour cannot self-correct before polling day: its central apparatus cannot aggregate dispersed Makerfield preferences, producing systematic value-schedule mismatch that the by-election prices. Weighted average of framework confidences: (0.70 × 0.30) + (0.64 × 0.17) + (0.68 × 0.25) + (0.65 × 0.28) ≈ 0.67. Base rate for the compound condition (retention AND >10pp decline) in safe Labour seats under current Reform UK conditions is estimated at 0.55; the cross-paradigm convergence and structural macro conditions adjust this upward to 0.67.