It doesn't have to be corruption, which tends to reward the people in the know far more than those who aren't! There is already the concept of an expedited pay

It doesn't have to be corruption, which tends to reward the people in the know far more than those who aren't! There is already the concept of an expedited payment. You want the concrete on the agreed schedule, it's $3000 but if you need it express because you screwed something up, you can pay $500 and we'll get another driver in etc.