ERP, road tax, import tax and COE etc are all inter-related and
it is all about balancing act.
Reducing road tax and import tax, and issuing more COE are loses to
the government, while ERP will help to compensate for that. So what
they are saying is that without ERP, we will not reduce the road
tax and import tax etc..
So technically speaking, it is right to say that ERP has made car
ownership more affordable. but it is not to say that it is cheaper
to run a car in Singapore.