By Ken Parks 
 

BUENOS AIRES--Argentine bank employees staged a one-day strike Thursday to demand a 25% pay raise that could spur similar wage demands by other unions.

Inflation that most private-sector economists say has been running at or above 20% in recent years has led the country's powerful unions to win even greater wage increases.

The strike comes at a sensitive moment for Argentine consumers, whose cash needs skyrocket during the Christmas and New Year holidays. A strike by bank workers not only means shuttered branches, but also the risk that automated teller machines run out of cash.

Participation in the strike was mixed, with some private-sector bank branches, including those of Banco Patagonia SA (BPAT.BA, BPTGF, BPTGY) and subsidiaries of Citigroup Inc. (C) and Banco Santander SA (SAN, SAN.MC), open for business.

"Tomorrow we are going to work so we aren't blamed for the lack of money in ATMs," Eduardo Berrozpe, the bank workers union spokesman, said in a television interview.

The strike went ahead even though the Labor Ministry Wednesday ordered a 10-day cooling-off period to give the union and banks more time to strike a deal.

The Labor Ministry said it would fine the union for ignoring its order to call off the strike.

"We are going to apply all of the fines we can under the" labor law, Deputy Labor Minister Noemi Rial told Radio 10.

The bank workers union is one of the first unions to hold annual wage negotiations, which for most sectors of Argentina's heavily unionized economy take place in March and April. The preliminary pay raise bank workers typically win in December can set the bar for wage talks in other industries.

Next year's wage talks could prove to be especially conflictive as employers and the government try to limit salary increases that are eroding margins and the competitiveness of Argentine exports.

But high inflation and a feud between President Cristina Kirchner and one of the country's most influential union bosses, Hugo Moyano, will likely make for tense salary negotiations in 2013.

The heavily questioned national statistics agency, Indec, said 12-month inflation as measured by its consumer-price index was 10.6% at the end of November. But most private-sector estimates say inflation is now around 25%, even though the economy will likely struggle to expand by 2% this year due to a drought and weak trade with Brazil.

The government data show wages rose 24.9% on the year in October.

Write to Ken Parks at ken.parks@dowjones.com

Subscribe to WSJ: http://online.wsj.com?mod=djnwires