What are some pros and cons of migrant workers?

there are mostly cons as it was a lonesome harsh life with poor wages and a bad lifestyle as many of the migrant camps were filthy yet the the government organised settlements were pristine. though it was a harsh lifestyle these men were getting their wages though they weren't a lot it was enough to keep them going and to get by in life the were given their meals on the ranches and had a roof over there heads.