Belgian Unions and Employers Unite Against Wage Indexation Cap
In an extraordinary display of cross-sector solidarity, Belgium’s trade unions and employer organizations have jointly called on the federal government to abandon its planned vote on a program law that would cap automatic wage indexation. The rare alliance, formalized through the Groupe des Dix (G10), underscores the depth of opposition to one of the most contentious measures in the Arizona coalition’s 2026 budget package.
Context: What Is at Stake
Belgium operates one of the world’s few automatic wage indexation systems, which ties salary increases to the cost of living. The government’s proposed “index centime” mechanism would cap indexation for salaries above €4,000 gross per month and pensions above €2,000 gross per month, meaning higher earners would receive only partial adjustments. The measure is part of a broader effort by the five-party Arizona coalition—comprising N-VA, MR, Les Engagés, Vooruit, and CD&V—to reduce Belgium’s public deficit, which exceeds 100% of GDP.
The G10’s Unprecedented Appeal
On the evening of Friday, May 15, the G10—a formal consultative body comprising five trade union representatives and five employer delegates—sent a letter to Prime Minister Bart De Wever requesting the postponement of the vote scheduled for Thursday, May 21, at the Chamber of Representatives. According to La Libre Belgique, the G10 urged the government to reject the program law entirely, arguing that more time is needed to assess its implications.
The request is partly grounded in a new assessment from the Federal Planning Bureau (Bureau du Plan), which indicated that additional time is required to calculate the precise budgetary impact of the reform.
A Rare Labor-Business Alliance
The joint opposition is particularly striking given the traditionally adversarial relationship between unions and employer organizations. Pieter Timmermans, CEO of the Federation of Belgian Enterprises (FEB), warned that capped indexation creates a “moderation salary contribution” that could cost employers €1.1 billion annually starting in 2029, calling the mechanism “a nightmare for administration.”
On the labor side, the socialist trade union FGTB denounced the measure as “not only socially unjust, but also technically impracticable.” The union’s statement reflects broader concerns that the cap would erode purchasing power for middle-income workers and pensioners.
Alternative Proposal Rejected
The G10 had previously presented an alternative mechanism on April 22 that would smooth energy price fluctuations over 12 months rather than capping indexation directly. This proposal was formally rejected by Prime Minister De Wever, who has reaffirmed his commitment to the capped indexation as a cornerstone of the coalition’s fiscal consolidation strategy.
Political Divisions Within the Coalition
The G10’s appeal has exposed fractures within the Arizona coalition. While N-VA and Vooruit remain inflexible in supporting the measure, CD&V has now clearly expressed support for the G10’s request, raising questions about whether the coalition can maintain a united front ahead of the May 21 vote. MR President Georges-Louis Bouchez has defended the proposal, arguing that if inflation exceeds 2%, workers would regain full indexation on their entire salary—a provision he describes as a safety valve.
Expert Criticism
The complexity of the proposed system has drawn sharp criticism from academics. Professor Jean-François Husson of UCLouvain described the calculation method as “Kafkaesque,” noting that social secretariats will require significant time and expense to adapt their software for the partial indexation system.
What’s Next
With the vote now just days away, the pressure is mounting on the Arizona coalition. The G10’s unified stance—backed by new data from the Federal Planning Bureau—presents a formidable challenge to the government’s legislative agenda. If the program law fails to pass, it would mark a significant setback for the coalition’s fiscal plans and could trigger a broader political crisis. All eyes are now on the Chamber of Representatives as Belgium’s social partners watch to see whether their unprecedented show of unity will sway the outcome.”