I'm more interested in balances to supply drain. I could never get very far in a game because I was spending ALL my time trying to hunt any enemy close by to gain scraps of supplies. Actually keeping positive supply, much less enough overstock to try sitting still for ambushes or to spend time hunting specific bounties was impossible. I was often just hand-to-mouth attacking the first enemy I could find, desperate for supplies.
It's not like it used to be back in the single-system build. You rarely come out ahead on supplies through piracy alone unless you hit freighters and have freighters of your own to carry the loot, sell off all the salvage you take to buy supplies, or (as Kanil said) go after bounties.
Early on you're usually better off taking on small scouting groups or trading in bits and bobs to put together cash to buy up a freighter, then use that to do cargo runs to build up a reserve of cash and supplies, buy yourself a bigger ship and/or a few extra frigates &c. Once you have a little strike group together you can do the small-time bounties effectively (provided you kill shit fast before your ships die) and build up from there.
Basically it's just that it isn't ezmode logistics any more, the way you used to be able to completely restock supplies and fuel by hitting any random ship or group. Think of it as them being in the same boat as you, running on the edge with just enough to get by. Whatever you recover is going to be scraps of a fairly small supply. Which is, again, why you should buy a freighter and raid freighters if you want to fight, they carry loads of loot.
It's especially evident once you have a large fleet. Yes, much more possible to make profit solely by selling loot and captures from random fleets, but if you just keep a big fleet sitting around in open space it's going to be a substantial financial drain, and rightfully so. There's a reason that such things are usually the affair of governments and equivalent entities.