Once there was an old engineer retiring from a company after working there for many years. He's their top notch guy and knew their system inside out. Couple months later the biggest machine in the company stopped working, costing the company millions in lost production. No one could fix it. In desperation the manager called the engineer to come in to take a look. The engineer looked around the machine for a few minutes. He put a chalk mark on the machine and told them to use a hammer to bang on it. They did and the machine was running again. The manager was very thankful and told the engineer to send in the bill for the repair. The engineer sent them a bill for $100,001.50. The manager called him and was upset for such a huge bill over a small repair. The engineer replied, $1.50 for the chalk and $100K for knowing where to bang the machine.

You sir are a knowledge worker. Companies pay you for your knowledge, your experience, and your ability to solve problems. They are willing to pay you to sit around so that they can call you to work on something at the moment's notice. People are willing to pay reserved instances in AWS though the reserved machines do nothing most of the time. It's called reserving capacity. Same in your case.