Number of cars on the road depends on population at this point an on the housing model. We don't build "more and more roads" just to accommodate an infinitely growing number of cars. This is a mature market, no the 1950s or 1960s. If areas are deemed too congested there are already ways to limit congestion.
No, this is a tax income problem caused by EV but they are taking the 'opportunity' to bamboozle us into thinking that trackers and dynamic pricing is required and that there is no alternative.