of course it does not belong to gambling board, people thought its a gambling post simply because op mention lottery, perhaps it doesn't have anything related to gambling. the op would have just make the post without involving lottery because this is just a contribution that involve coin flip to know who to take first.
Yes, it has nothing to do with gambling at all. I will not blame the OP for including lottery, although definitely it has nothing to do with lottery, but I will blame the people that just read the topic title and just concluding that it is lottery and post that it belongs to the gambling board which is absolutely not correct. This are the kind of people that will read news headlines and make conclusions which can turn the news into something of another meaning. They should not just read the topic title but also read the topic post.
I was curious when OP mentioned salary lottery because it was my first time hearing about it. But when I read the whole topic I saw that it is not gambling but something like a turn to get everyone's salary. I really regret people who just read the title and then concluded that this is gambling. Yes I get what OP meant. This kind of thing does not exist in my country. But I think we have something similar. Instead of taking the whole salary in my country an employee can join a weekly or monthly contribution where you can take the whole contribution fund according to the order. For example if you are paid $100 then you can join a monthly contribution of $20. If there are 10 employees then the total contribution each month is $200 and later 10 employees will be drawn to determine their order. Basically this is almost the same as the salary lottery that OP mentioned but the mechanism is a little different.