Khilafat is the only system of government and state that entrenches your right to a home, education and healthcare until the end of time. Secular systems will change to suit the times, that is not the case with Islam. It is mandatory upon the State to give your children an education, give them full healthcare, protect your borders, ensure law and order, keep economic stability and be transparent through the end of time.Why is a Khalifah or a sytem of Khalafat necessary?? What is it that a Khalifah will do that the common man, or a Premier or President or Monarch cannot do? What set of probloems is the Khalifah a solution to?
Khilafat even has its own economic system to help pay off the massive social care required for the whole world, and to keep technological progression & innovation running. Khilafat has a system of checks and balances that involves the use of many meritocratic jurists, elected representatives, the military and even the people through direct action.
The laws to guide our social, political, economic and religious conduct have been set in stone...our job is not to legislate our own laws.
The only variable that needs to 'change with the times' is the administrative organization of Khilafat...which is not a matter of creed. So if technology can bring forth Shariah quicker and more effeciently, then that technology should be adopted. If there is an electoral method that is better representative of the Ummah, then it should be adopted. Note the goal of these methods is to see who or what implements Shariah the best way.
For example, Shariah demands universal healthcare.
Hizb-A says it can bring it in 9 months, and shows you its administrative, organizational, etc, plans. Hizb B says it can bring it in 7 months, and shows you its plans. The people can analyze each plan, and then decide to vote for the most effecient and organized party.
Another example; Hizb A says the bureaucracy needs to be shaved by 30%, and it offers a technological solution to the issue. Hizb B says bureaucracy is not the issue, but the fact that more gold needs to be mined. It is halal for the Khilafah to have more funds to spend on halal (laws of Islamic STATE) things. So now the people may elect the party they think has a better solution to the issue.