Separately, the International Labour Organisation said that the government's plans breach its international obligations on labour rights.
The International Labour Organisation forecasts that unemployment worldwide will rise by around 30m above 2007's level in 2009.
The head of the International Labour Organisation (ILO) said that crisis required measures to protect workers from the downturn.
They complain that some of the signatories to CAFTA fail to enforce labour standards laid down by the International Labour Organisation.
ECONOMIST: A small victory for free trade as CAFTA passes | The
Several of these have begun talks with the campaign and with the International Labour Organisation, an arm of the United Nations.
No-one knows the scale of the problem, but the International Labour Organisation estimates at least 200, 000 children are trafficked within west Africa annually.
The unit stems from an agreement last year between the government, the unions and business leaders after talks brokered by the International Labour Organisation.
The International Labour Organisation has said it is watching Venezuela closely.
Jorge Nieto, the minister of labour, brandishes a book-length certificate from the International Labour Organisation to prove that the country's labour laws do meet international standards.
ECONOMIST: Labour rights and free trade with the United States
The unemployment rate, on the International Labour Organisation's definition, fell to 5.8% in the three months to February, the lowest since the series began in 1984.
Organiser David Pott said they hoped the walk would also draw attention to the estimated 12 million people the International Labour Organisation reports are working in modern slavery.
Estimates from the International Labour Organisation suggest the number of people unemployed in emerging economies rose by 8m in 2008 to 158m, an overall jobless rate of around 5.9%.
Shipowners hope that, if they do not succeed in getting rid of the payments by negotiation, a new convention on seafarers' rights being drafted at the International Labour Organisation, a United Nations body, will put an end to the scheme.
Qatar and other Gulf states have long been criticised by international labour and human rights organisation for the poor treatment of migrant workers who suffer from low wages, high death rates on construction sites and substandard living conditions.
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