On the other hand, the current government could easily announce that starting in 2020 all new government fleet purchases are required to be electric and it would help create a lot of new competition to bid for those orders.
Purchasing electric fleets in order to speed up development and adopting of EVs is leading by example.
Many of the city's other vehicles are electric, for example the vehicles used for collecting litter or moving the workmen who do minor repairs.
That isn't the national government though. I don't know what cars they use.
I don't want to link to the kind of newspapers that report on European royal families, but the crown prince of Denmark takes his children to school/nursery by bicycle. (Last time I saw them, the oldest was riding her own bike.)
[1] https://www.sustainable-bus.com/electric-bus/copenaghen-purc...
In Norway you're going to have a hard time finding a petrol or diesel car that fits the government requirements.
See §5: https://lovdata.no/dokument/SF/forskrift/2017-12-11-1995/§5
We have plenty of hybrid buses where I live though (in Norway).
Even in the US, the USPS is experimenting with electric mail trucks: https://about.usps.com/what-we-are-doing/green/vehicles.htm
If the ban is the stick, the best return on the carrots would be increasing public charging infrastructure. SF runs chargers in front of city hall, for example.
"Rules for thee and not for me"
The government is happy to tell everyone else what to do but when it comes time to buy their own vehicles they don't have to play by those rules so their decision making process does not reflect the presence those rules and they wind up buying ICE vehicles for the majority of use cases because from a strict numbers perspective those are what make sense in a majority of use cases.