Although looking at that graph, it was under Levy's stewardship that Arsenal opened up such a huge financial gap between us and them (though I do appreciate here that this period coincided with the Champions League riches). I think the way that Levy has allowed the club to grow organically has been superb but I can't help but think that with some early owner investment we could've been receiving those CL riches more quickly and got to where we are now (and indeed far beyond) far more quickly.
I saw a table that showed owner investment into premier league clubs. Only Arsenal, Burnley, Middlesboro and Swansea were below Spurs in this respect.... With WBA's owner putting in 50% more, Palace's owners putting in twice as much as ours, Watford's over 3 times the amount, Southampton's over 4 times, Bournemouth and Hull over 5 times more than our owners, West Ham's about 7 times, Stoke and Everton 8 times, Sunderland's owners about 13 times the amount and the owners of Leicester, Liverpool, Man Utd, Chelsea and Emirates Marketing Project making anywhere between 15 and 90 times the personal investment that our owners have made.
Mr Levy and Mr Lewis have increased their net worth by a huge amount through owning Spurs. Levy can be proud that he has managed to achieve that via very good management. However they are quite unique in terms of club ownership in terms of not investing their own money in an attempt to improve the standing of the club.