The saying: “first come, first served,” is very elementary.
But what is interesting about it is that it speaks about the very tenet of what is supposed to be the normative expression of justice in an avenue where consensus is supposed to be built, it is very similar to a situation when you fall in line to avail of something (like say at a fastfood chain). Where of course it is only fair for those who are at the front of the line to be accommodated first since they did made an effort to be on time or at least to qualify them as deserving of the commodified service because they came first from the others.
Now it would be a different story if someone is to cut corners.