Don't know about Messi but we still owe Alba around 50% of this year's wages AFAIK. Probably Busi as well. And then there are still deferred wages for likes of MATS (with his recent renewal we just pushed them down the road) and FDJ.
This was our planned budget for 2022/23 season from last year financial report (while waiting for the club to release a new Annual report which usually happens somewhere mid-October).
Obviously increase in salaries (and operating expenses in general) was only possible due to extraordinary incomes (palancas) but that was a one-time thing. Included in that budget are still wages for likes of Pique, Alba, Busi and players out on loans who covered part of their wages last season (especially Umtiti,...).
Could be wrong but I think what's included in salary cap limit are Sports personnel wages (519m) and Fixed asset depreciation (140,5m). So we get to close to 660m which is few millions more than mentioned above but probably some things are excluded or calculated differently.
Also important to note that costs of Players aquisition rights will be reduced considerably next season. But we'll ofc have to add Vitor Roque and whatever signings we'll make for the 2024/25 season.