Why does everyone have to pay for travel together? What exactly is going on?

If the group travels at its own expense, it is best for everyone to pay together and share the cost. First, it is fair to everyone and there will be no disagreements over who pays how much. Second, if you contribute money together, you can play freely and have fun together. If only one person contributes money, you still need to see whether others can play this or that.

When I travel with my friends, we always pay for it together and share it together, so we can have a good time and avoid conflicts