We live in a world where our online IDs are in the hands of the government and banks, and we rely on them to keep it secure. Blockchain IDs on the other hand, put you and you only in control. Therefore, you can store all your passwords and any other personal information on the blockchain, eliminating the need of passwords in everything. In the future, these ID services could be applied to government services, medicines and any other record keeping agency.
Blockchain system exist to combat greed and middlemen and to give individuals ultimate control of their identity and activity. In a blockchain future, we will see a world where our medical records are immediately available if we are in an accident; where online voting was possible; and where transparency was paramount and greed is disincentivized.
Blockchain is a very secured server. I do not know why government won't implement this on the country. It is the best security until it was made. All important records, archives, keys, etc. really needs it to lessen security breaches. This thing is the future and we can't let the future be cheap since it is for the convenience of all.
First of all, blockchain is not a server, it is a system that connects so many computers in the world building what it is called decentralized chain of blocks, more detailed explanation you should read on wikipedia. The government didnt want to implement blockchain despite having so many benefits is the fact that the blockchain is decentralized, although there's some way to modify blockchain and make it more centralized however it seems that majority of the countries are still too afraid of using it, they are in the state of doubtfulness.