I kow a lot of effort was put into the unfulfilled demand rules but I am still a little in doubt.
If an event causes every player to lose a demand token and one player is unable dors everyone get a wound or just him?
If a player is unable to pay the determination as cause of moral does one player get a wound or each player?
By demand token do you mean determination token ?
If so, then only the player who misses the determination token suffers a wound.
During morale phase, it is written in the rules that "first player checks the group's morale", so if the 1st player misses 1 or several determination tokens to discard, he takes a wound for each lacking token. Only him suffers wound(s) in this case because only him get the morale level reward or loss
Hope this helps !