Introducing a new local currency after an event

[2DaysAgoASawAVehicle]

To my understanding everybody will be working as hard as we have never worked before...
Example:
a doctor might not be doing much on a daily basis but is there if something serious
Happens(amputation,etc,etc)He does not have any patientes during the day?time to pass his knowledge to the future doctors.That's how he will earn his food,etc.
A carpenter...well,several tools are made with wood(the old trusted electricity free ones)and require maintenance too.
You have no skills?a pair of eyes it's all you need to look after the security of an area with food/kids,etc
We will have to integrate(the bigger community the better)
The old Soviets had the idea of rewarding those one that could produce more,it was not about
The quality,you make 10 more of wherever you produce then you get a bonus.
Mass production is the idea,the you can barter for anything you need,doctors,beds,named.
After that,I'm afraid you need someone in charge to issue new coins,notes...someone that can be trusted.
Or you could establish a value for things and trade them between communities,like the gold between countries.
Example:
A community has a extra stock of bread(wherever)that can be sold to another community for 20 "New Pounds" and then that community could buy the services of a Doc,carpenter,Guard,etc for X days in exchange.
Only the Leaders(the Accounts department)would handle that and be a benefit for all of us.
You don't need real money if we have all agree on the value of things.Trust is the word.

Rafael