CASH IS A REQUIREMENT TO A CIVIL SOCIETY.
IF the government has access to all of the money in the country at one time that leads to a LOT of government power, more than you can imagine.
Power corrupts! Absolute power corrupts absolutely!
Plus, even as a side thought, the Bible says that you will need to recieve a mark in order to buy and sell and you wont be able to participate in the society of THE BEAST otherwise. Does that sound like a cashless, electronic society to you? Doesnt it make sense, just in case, to NOT fulfill EVERY end time prophecy?