I don't think of it as the Sims using a cheat, but of the Sims applying to me, as the government, to supply the money.
The advantage of Cyjon's loan jar over other lending mods is that the money can be 'borrowed' each week, then the jar can be deleted, which wipes out the debt. Wow, those vary from the very generous to the very mean! I have Sims on welfare, but they're not just single Sims, so I use the familyfunds cheat or Cyjon's loan jar to give them the exact amount calculated for their family circumstances (weekly personal allowances of 300 for an elder, 200 for an adult and 100 for a child, plus rent allowances if they're living in an apartment, all paid at 6 pm on Sunday).