What is the level of the bottom price and why cannot we bid to decrease it?

Everyone knows GWEI can skyrocket to 300+, making ETH chain tremendous costly.
We additionally know that there’s a base price. For instance, if the common gasoline price is 100, maybe your base price goes to be one thing like 80. You may't ship with lower than base price GWEI otherwise you'll get this error:

https://preview.redd.it/f7a48t800pib1.png?width=484&format=png&auto=webp&s=21c04890311e04fbfa7f6f2ee6d6dc423d97e83b

Some my query is, why can't we make it so individuals can bid on decrease price than base price?
Say the bottom price is 80 gwei, and the bulk ship "30" gwei and a number of individuals are prompt by the RPC to make use of that price. I'm certain if we encourage this kind of motion, in a pleasant means, we might all hold gasoline costs beneath management.