I presume the unassigned traits we see are for the future or other hypothetical scenarios. The FWL might be argued to have a booming economy when it was busy being the arms seller for the Inner Sphere.
That is perfectly reasonable but please see below.
The state-run trait encompasses control over the populace as well as the economy. So it can also be envisioned to encompass how the societies of the Combine and the Confederation are willing to (or forced to) accept greater civilian privation in order to free up resources for the state. The decentralized trait means also the government is more regional, which describes the unruly March Lords of the FedSuns, so resources may be spent on appeasing local interests rather than being made available to the central government.
I'm not sure that such an 'intangible' works in this situation.
The net effect of these particular traits is that it simply bankrupts the Federated Suns right out of the starting gate.
The AFFS has 77 house commands, 38 mercenary commands, 5 capital forts, 7 standard forts. The basic non-combat supply costs (including the x 2 cost for mercenary commands) comes out to 1281 RPs. Unfortunately, with the -20% penalty the FS only brings in 1242 RPs. A deficit of 39 RPs. The FS is the only Inner Sphere House so effected.
The LCAF costs = 1336 with an income of 2086; 750 RP surplus
The CCAF costs = 716 with an income of 1245; 530 RP surplus
The DCMS costs = 1069 with an income of 1850; 781 RP surplus
The FWLM costs = 914 with an income of 1540 (or 1260); 626 RP surplus (or 346 RP surplus)
While trade will increase the FS income by a certain amount it also increases the other house incomes so the disparity is not reduced.
These trait modifications do not appear to be well thought out or were not 'play tested' to check their impact.
What we have here is the Federated Suns, arguably the most powerful House of the era, effectively crippled and not even remotely possible of fighting a war as per the canon sources (4th SW or otherwise)
At the same time, the Capellan Confederation, the one House that could not meet its expenses and was finding it difficult to maintain the forces it had, receives a healthy surplus each month. With the economics and supply rules as noted in ISaW the CC is actually capable of attacking the FS rather than vice versa.
Discard the economic traits (possible exception for Parl. Chaos) and the numbers look like this (note trade values assume no trade with immediate neighbours or Periphery):
AFFS costs = 1281 w/ income of 1554; 273 RP surplus + trade (~155)
LCAF costs = 1336 w/ income of 1738; 402 RP surplus + trade (~174)
CCAF costs = 716 w/ income of 966; 250 RP surplus + trade (~97)
DCMS costs = 1069 w/ income of 1480; 411 RP surplus + trade (~148)
FWLM costs = 914 w/ income of 1400; 486 RP surplus + trade (~140)
AFFS+LCAF surpluses = 1004 RP
CCAF+DCMS+FWLM surpluses = 1532 RP