It's not impossible to say "Positions vary from $20k to $600k, DOE." for these cases, if you really are hiring your new CTO and also a janitor. The nice thing about having to put _some_ kind of range is that there is some the poster will have to choose whether or not to reveal they _might_ pay well. And there are balanced incentives to go either direction. If you post low, you miss out on talent, and if you post high you have to convince every noob that might be useful they aren't worth $1M/yr. But having to decide that balance is useful.