If you mean through loot, then yes. As it is now, a bit of loot filled with rags and rusty weapons can pay for your whole army. The economic system make no sense when a suit of armor is worth more than 50 troops wearing that same armor. This needs a major overhaul. Lower the price of all items and slightly increase upgrade costs for troops. Could even make the upgrade cost the price different in items between the two unit tiers.
Make battle loot be mostly about gaining renown and money but most of the money should be coming from ransoms while the rest of the loot affects 3 things- party morale, influence/renown, money.
Win a battle and get 10k just from selling the loot- doesn't make sense with the current system of unit upgrades etc. What it should be is that loot value is simply based on the unit tiers and lords defeated with a small modifier based on the renown of the lord/faction defeated.
Let there be a triangle scale between renown/influence at the top, morale on the left, money on the right.
Defeat a party worth 10k? The Faction has 1000 renown and the Lord leading the enemy party has 400 influence, you get 1 renown per 100 and 5% of the Lord's renown you defeated IF you do 100% to the top of the triangle. So 10 renown and 40 influence but 0 party morale or gold.
If you select the middle of the triangle you get 3,333 money, 3 renown, 14 influence(roughly 1/3 of full value) and at +1 morale per 1k of defeated enemy value, +3 party morale. If the party defeated was a main faction get 1.2x modifier so 4k money, 4 renown, 16 influence, and +4 morale.
High morale should be correlated along with medicine to the % wounded after battle. High morale = less deaths. AI faction leaders could get a small buff to morale. I think TW obsession with having AI and players follow the same rules is admirable and should be a design guideline but not the only rule.
Capture a Lord? Ransom for 5k or whatever based entirely on that Lord's rank/influence.
The current system where you earn loot and pieces of armour from a battle will never work when you also have to equip units and use loot for smithing. If you didn't get loot from battles (aside from stripping captured lords of their gear) you would have to win gear in tournaments or buy it.
Remove the loot from battles as equipment and make it straight money/renown/morale. If TW really wants to keep something of value in- trade items can still be looted so production doesn't 'disappear' from the game. The tediousness of clicking thousands of times to transfer gear to sale screen is a huge downer not to mention that model simply does not make sense with the unit upgrades/economy/smithing systems.
High tier units should require a certain party morale to join and remain (other than companions whose morale should be based on fulfilling their quests aside from a handful of pure mercenaries who will only stay so long as battles are won). This way getting and keeping higher tier units requires maintaining morale and posting high tier units to a town with no food/constantly under siege/no companion leader will lead to desertion.
Lower tier units will stay at lower morale levels as they have fewer options so even gross mismanagement won't leave cities without a garrison, just that garrison will be filled with thugs and recruits.
Once player declares their own Kingdom or is Appointed high enough rank in another Kingdom they can borrow the Faction's morale giving some +% of base morale (which is based on leadership) so you can have a chance of keeping high tier units even if lost a couple battles or posted to a town/garrison with no leader for a couple weeks.