As I undertand the organizational structure of the ISU, the "shareholders" are the individual national federations that comprise the ISU membership. As for judges, the ISU certifies their qualifications at the international or "ISU" levels and maintains the lists or qualified judges. Prior to a majpr competition there is a random draw (I am not 100% sure that it is truly all that "random," but at least the draw is conductred in public view with many witnesses). The participantrs in the draw are the national federations. The draw determines which countries will be invited to send judges. Much later each federation decides which of its judges to send. The ISU does not say, no, we don't want that guy, send sombody else, please. This would be stepping on the toes of the federations.
It is the same with the skaters. The ISU decides which countries will send skaters to major competitions, but each national federation decides which skaters to send.
For ISU Championships, yes, there is a draw among countries. Only countries with ISU judges can enter the draw. The first draw is done among countries who had a skater in that discipline in previous edition. Then, if necessary, a further draw is done among the rest (for 4 Continents, it is first opened to other 4CC Feds and if there are still unfilled spots on the panel, to European countries too).
The Olympic draw is first down among countries which had a skater qualified in that discipline through World Championships. If it is not enough to fill the whole panel (for Pairs and ID they may be not enough), a second draw is done among those qualifying through the final qualifying competition. If it is still not enough to fill the whole panel, a final draw is done among countries without a skater qualified but who took part in previous year's Worlds in that discipline.
In GPs, the standard practice is to ask countries with a skater invited to that event to nominate a judge.
In all other international competitions, when Feds enter a skater, they also nominate a judge.
So, the situation of a judge judging a skater of their own country is encouraged by how panels are selected (even with the draw, the draw starts with countries which had skaters the year before which are those most likely to have skaters in current year too).
I think all judges mark their own country or former country or coaches skaters Higher than other skaters regardless of competition Also , what do you mean volunteers ?. They may not be paid in wages but they are paid. Doesn't the ISU pay for their rooms , flight, and food. Do they pay for them to take classes to understand the scoring system.?
Or they are, volunteer in if they don't get paid wages?
Judges' hotel and meals are paid by the organizers in all international competitions.
In ISU Championships and Senior GPs, ISU cover the travel expenses too. In the other competitions ISU don't cover the travel expenses and organizers are not obliged. In most cases, the Feds pay the flight for their own judge.
Technical panel members and referees always have the flight paid by the organizing committee.
In ISU Championships and GPs, judges also take a small amount of payment (from 300 to 450 Swiss Francs):
https://www.isu.org/short-track/rules/stk-communications/591-isu-communication-2096/file
ISU don't pay judges to attend seminars for re-certification. Their Feds usually cover their expenses.
simple as that. They don't have a "right" to be a volunteer 
