If you had read MJ's contract with AEG then you'd already know that before MJ could take home any profits from the shows, he had to pay AEG back about $30 million for production costs, a deposit for a house in Las Vegas and the salary for his staff, including Dr Murray. So yes AEG was funding his lifestyle in 2009, but the tab would've fallen back on MJ as soon as the shows started.
That's the important part, 'would have', Michael had a habit of taking the money and running. To wit a previous promoter who Michael had taken money from was, as part of a settlement, entitled to be part of all of Michaels live shows.
If Michael had no money how would AEG recoup their money from him? AEG were dependent on him doing the shows to be able to repay them. Michael was in the position of being able to blackmail AEG by asking for more advances or no shows.
AEG's agreement with Michael may be part of their defence.
PS. The copy of the contract I saw didn't have a date on it.