What would a depression without a liquidity crunch look like? Just lower GDP?
This is a serious question, by the way. I don't know enough about economics to know the answer.
Capital concentrations can still occur under the V2 model, since Capitalists will still take money out of the consumption economy to plough into the production economy. This is a Marxist contradiction of capitalist, in that the more money that is used to produce goods, the less money is available to buy goods - in short, the more goods that are made, the less goods can be bought. So liquidity problems can and do happen, but the cause of them is rather different from the real-life versions - in fact, the lack of credit makes liquidity problems more likely.
Essentially, in real life, the Credit Crunch was caused because no-one trusted anyone enough to lend to each other anymore, and the vast majority of real-world economics is based on credit. Something similar occured in the Great Depression, after the initial stock market crashes etc. Liquidity ceased to exist, because just about all the liquidity in the real life system was credit.
In V2, the liquidity is hard currency. But it gets soaked up by Capis and ploughed into Factories, with the majority of the profits landing in Capitalist's pockets. As the amount of money the Capis own gets stored in national banks or factory budgets, consumer cash shrinks, causing demand to fall. This causes factories to fire people, which causes demand to fall further, in a vicious circle, until no-one can afford to buy anything and there's no demand for anything at all. THAT is a V2 depression
It can happen without a liquidity issue, as well; say all the dye RGOs in the world are occupied at once. All fabric factories stall, and start firing workers; with no fabric, all the clothes and luxury clothes factories also stall. Demand for cotton, dye, and silk all crash disasterously, so now all RGO workers in those three types (plus all those textile factory workers) are now unemployed, taking a big chunk out of demand for other goods - resulting in a lot of other RGO workers being fired. This kind of slump is not as bad as a liquidty slump, since there's plenty of cash in the system so some POPs are still buying goods and making money. Demand for textiles will skyrocket, so when the dye market comes back online it will rapidly re-hire staff and the system will be able to re-adjust.
Government spending curbs the problems of the V2 economy, of course, so good old-fashioned Keynesian ideals work perfectly well in V2 (there's no inflation, so Stagflation, the bane of Keynes, can't happen). It can also rescue a depression. But since 'trust' is basically unquantifiable in a sane manner in the game, a credit system wouldn't ever be able to cause a RL-style credit crunch - it would really just improve the flow of cash round the system, so money couldn't get hoarded in national banks, and so depressions and recessions would become less likely, rather than mroe so.