Just as a heads up, Saito has a quantifiable cost of attack (for attackers) while still paying for a form of useful work (tx routing / fee collection) so waste and security are not intrinsically related.

https://org.saito.tech/saito-economics

The approach works exactly because money is guaranteed to be pulled away from the block producer. Given that it always costs more money to produce blocks than attackers can earn from them, only honest nodes (who spend other people's money) have am incentive to do so. Cost of attack is the money attackers cannot get back if they spend their own money to censor the network. Check it out!