Why Flat Fees?

Since the MSB is only responsible for processing and storing transactions but not for smart contract execution, there is no need to increase the network fee. Instead, contract deployers are rewarded for transactions going through their contracts into the MSB as they are part of the infrastructure.

Burning of $trac will increase its price against other assets like stables, thus utilizing common market rules (supply/demand) as natural way to control the tx rate.