im unsure how they have their current squad under the cap.

if the clubs buy the players cars and pay the rent for them etc. does this come under salary?  how is sydney getting around it?

Sydney FC would be in favour of scrapping the cap because of a situation like this.
Perth would want to get rid of it considering how they were punished for exceeding the cap several seasons ago, when they were having a great season.
CCM would want to get rid of it based on Charlesworths other stances like support for promotion and relegation. If scrapping the cap meant eliminating the floor too then Charlesworth would be a definite yes.
Not too sure about Greg Griffin and Adelaide United, although given Griffins desire for more opportunities for the owners to make money would open the door to support for scrapping the cap, if it meant that AU could have more control over their squad which would allow for more cheaper players and the chance to keep players that would otherwise leave if the cap was in effect (like Goodwin, Kamau, Djite, etc.).
WSW are a question mark (although I imagine the majority of their supporters are in favour of getting rid of the cap, given how they would be one of the clubs that could benefit the most from being let free).
Brisbane Roar are doubtful, especially with how terrible the owners have been. I cannot see the Bakries being willing to allow more clubs in the league to outspend them and build far superior squads considering how skimpy and ineffectual they have managed the Roar.
Wellington Phoenix are most likely against it because it would be the final nail in the coffin for them, but they have bigger problems than the salary cap (or lack thereof) to worry about. They seem doomed, cap or not.

That would most likely mean that 6 clubs are definitely willing to scrap the cap, 2 are uncertain, 1 is doubtful, and 1 is against (but that club looks doomed regardless). Definitely a majority could push the case for eliminating the cap and can directly benefit as a result.
 

There was an article about it recently.  Basically everyone who is not a starter is on minimum money.

I thought that also and "His representatives believe he is worth six figures," 450000 is 6 figures perhaps it's meant to be 7

So if a player signs a 3-year contract and performs below expectations, he’s still entitled to the salary that was agreed on the contract.But if it’s the other way around, why can’t Sydney just say ‘You agreed to play for 3 seasons at X salary - that’s how contracts work’?Because the player will sulk? Feels like blackmail to me.

The Smurfs don't have 2 players for every position so have limited their payments to the starting 11 and subs bench. Brosque and Ryall would give them exemptions under loyalty. Simon would be dirt cheap (and acts like it, refer all to Squires from last Thursday). Otherwise, there should be a salary cap investigation but this won't happen under Lowy since the ESFC is part owned by the Lowys. 

Any FFA Board member or employee should NOT have any financials interest in ANY A-league club