if poor countries set up big mining farms, they can make big profit from bitcoin
I can't see governments of poor countries jump into Bitcoin by setting up entire mining farms. It will be wealthy individuals in these countries, or investors from abroad that might get to set up mining farms if they find it to be cheaper than going for China to set up everything. If you consider that poor countries have a very poor power network, where power outages are a frequent occurrence, then it's not a very interesting option for them. Don't forget that a lot of these poor countries are not very Bitcoin friendly either. Another negative point that any serious investor is taking in mind.
Setting up mining farm is not only way to get bitcoin, there are other way such as setting up a freelancing sites that caters unemployed talented bachelors and give them an option to choose between local currency or bitcoin but charge employer with bitcoins. This does not require a big fund but a good contacts which the government has.
I know it's not the only way. I was just responding to the quoted part in my post, nothing more. I hear people always talking about people can offer their skills or services to the public and then earn money. But what about the people that don't have any skills? What about people that don't have regular access to the internet? What about people that are stuck to their 10 hour job where they work 7 days a week just to feed their family? They won't benefit from freelancer sites and all that. Take in mind that these people are the far majority in these countries.