The hypothetical that we take tippett and all his huge salary, in order to get another swan- doesn't mean we'd get that 'other' swan at a discount.
Eating tippetts money to relieve their salary cap would just maybe give us ACCESS to another (contracted) swan.
Access we (and other clubs) wouldn't otherwise have without taking all of tippetts cash.
As I said, depends on how desperate the club is to offload the salary. Agree, clearly works better in a uncontracted player situation where clubs already have the access. It's a hypothetical, but we should be using that strategy to our advantage, Carlton seem to be all over it.