The role played by immigration agencies in controlling the numbers of people desirous of settling down in many countries of the world is indeed commendable. The numbers of people suing countries for rejecting their immigration applications would become very large if these services do not play their role in accordance with the policies of their governments. Developed nations like USA, Canada, Britain, France, Switzerland etc receive thousands of applications from men and women around the world on a daily basis. These people want to leave their countries and move in to a country of their choice in search of better living conditions, higher quality of life, and high income opportunities. Only a small percentage of these applicants are found eligible for emigration by immigration agencies of these developed countries. Despite taking help from computers in processing of applications, it is not possible to handle applications in such large numbers on a daily basis. This is why most countries have put in place Solve to provide speedy processing of applications.
A visa is necessary for any person to go to any other country. Normally countries grant visas that are valid for a time period of maximum 6 months. But you can apply for citizenship directly if that is your objective. If you have urgency on medical grounds and need to move and settle down in a foreign country, you have the option of applying for citizenship using fast track immigration services. These services are quicker than normal procedure and so it is natural for countries to charge higher fees for providing these services to the applicants. If you want to fast track immigration services, you need to apply in the prescribed format and pay higher fee. It does not mean you will be granted citizenship by the concerned country.