Whilst it is a well articulated piece by Mr Wray, the investments he makes do not appear to be available to players at other clubs and are therefore a financial incentive only offered if players join Sarries. It may well be allowed within the written laws however is against the point, and in complete disregard, of the salary cap. They appear to be operating on a completely different financial level and in my view have only been a dominant force because of this. I personally wouldn't field anywhere like a strong side for Sarries away games because I don't value the competition it offers, I would for home games only because Wasps fans want to see their top players.
As for "bending" the cap during the WC that is a dangerous move that would likely lead to opening the idea for 6N periods too. This is something which should be considered as part of the whole squad management responsibilities and is just bad luck if it hasn't been managed very well. Wasps will be hit all the same as other clubs.