This is closely linked to the Smart Card industry, a particluar interest of mine. The Smart Card industry in Asia is Government driven, and in the Western World it is Market driven; except USA which still seems to lag behind.
Singapore was one of the first countries to introduce automatice toll fare collection based on Smart Cards and set up a Government driven collection and reconciliation network to drive it. So they are more than half way there already.
Also the population is already very familiar with the concept of e-cash, another plus.
It could easily be the first country to integrate e-cash with the populace on an everyday basis. Unlike the article, I beleive 7 years is very possible.