May Day march in Phnom Penh

Cambodian opposition party law-maker Mu Sochua together with garment factory workers march during their May Day rally in Phnom Penh, Cambodia, Saturday,May 1, 2009. Hundreds of Cambodian garment factory workers took part in the May Day celebrations, demanding the government to enhance the minimum wage and their working condition. (AP Photo/Heng Sinith)

Cambodian garment factory workers hold banners while attending May Day celebrations in Phnom Penh, Cambodia, Saturday, May 1, 2009. Hundreds of Cambodiangarment factory workers walk on the streets in Phnom Penh to mark May Day celebrations, asking the government to enhance the minimum wage and their working condition. (AP Photo/Heng Sinith)

Cambodian garment factory workers march in front of National Assembly to mark May Day celebrations in Phnom Penh, Cambodia, Saturday, May 1, 2009. Hundreds of Cambodian garment factory workers walk on the street in Phnom Penh to mark May Day celebrations, asking the government to enhance the minimum wage and their working condition. (AP Photo/Heng Sinith)

Cambodian garment factory workers walk past the National Assembly during their May Day rally in Phnom Penh, Cambodia, Saturday, May 1, 2009. Hundreds ofCambodian garment factory workers took part in the May Day celebrations, demanding the government to enhance the minimum wage and their working condition. (AP Photo/Heng Sinith)

Cambodian garment factory workers walk past National Assembly during their May Day rally in Phnom Penh, Cambodia, Saturday, May 1, 2009. Hundreds of Cambodiangarment factory workers took part in the May Day celebrations, demanding the government to enhance the minimum wage and their working condition. (AP Photo/Heng Sinith)

Cambodian garment factory workers hold banners during their May Day rally in Phnom Penh, Cambodia, Saturday, May 1, 2009. Hundreds of Cambodian garmentfactory workers took part in the May Day celebrations, demanding the government to enhance the minimum wage and their working condition. (AP Photo/Heng Sinith)

Cambodian police attempt to block a road as teachers and garment workers march to mark Labour Day on the streets in Phnom Penh May 1, 2010 . About a thousand garment workers rallied in Phnom Penh on Saturday to commemorate Labour Day, while demanding for their pay to be increased to a minimum of $75 (315,298 Riels) per month, according to protest organizers. REUTERS/Chor Sokunthea

Cambodian garment workers hold placards as they march on the streets to mark Labour Day in Phnom Penh May 1, 2010. About a thousand garment workers rallied in Phnom Penh on Saturday to commemorate Labour Day, while demanding for their pay to be increased to a minimum of $75 (315,298 Riels) per month, according to protest organizers. The placard reads, "Reducing gasoline prices will reduce poverty". REUTERS/Chor Sokunthea

Cambodian police attempt to block a road as teachers and garment workers march on the streets to mark Labour Day in Phnom Penh May 1, 2010 . About a thousand garment workers rallied in Phnom Penh on Saturday to commemorate Labour Day, while demanding for their pay to be increased to a minimum of $75 (315,298 Riels) per month, according to protest organizers. REUTERS/Chor Sokunthea

Cambodian police attempt to block a road as teachers and garment workers march on the streets to mark Labour Day in Phnom Penh May 1, 2010 . About a thousand garment workers rallied in Phnom Penh on Saturday to commemorate Labour Day, while demanding for their pay to be increased to a minimum of $75 (315,298 Riels) per month, according to protest organizers. REUTERS/Chor Sokunthea

A woman holds a placard during a rally by teachers and garment workers to mark Labour Day in Phnom Penh May 1, 2010. Garment workers and teachers rallied in Phnom Penh on Saturday to commemorate Labour Day and demand pay increase, according to protest organizers. REUTERS/Chor Sokunthea

Cambodian garment workers hold a placard as they march on the streets to mark Labour Day in Phnom Penh May 1, 2010. About a thousand garment workers rallied in Phnom Penh on Saturday to commemorate Labour Day, while demanding for their pay to be increased to a minimum of $75 (315,298 Riels) per month, according to protest organizers. REUTERS/Chor Sokunthea