hello,
do gain money you can adjust this settings:
- tax
why is this bad?:
tax over 50% destroys your middle and rich class slowly, they degenerate to poor people. no effect on poor people. tax under 33% makes ppl happy. they also start to be rebbellious if you keep it high a long time.
- education
why is this bad?:
you research slower. also edu under 50% makes the people slowly loose literacy, over 50% edu makes the people slowly gain literacy. literacy is the number that decides how good your researchers are.
- crime fighting:
why is this bad? :
crime-f under 50% makes your people revolt over time (and revolting units are biger). crime-f over 50% makes your people more calm (and revolting units are very small).
- social spending
why is this bad? :
low spending makes your population "democratic", it raises its conciousness. that means if you are a monarchy they start to hate you over time - if you are very democratic already you do not need social spending

the people just get even more "democratic".
- Defensive spending
why is this bad? :
low def-spend gives you low prestige growth over time. also your "Manpower-points" (with them you repair units and build news ones) has a lower maximum, it also can be negative. if suddenly a war breaks and you set def-sepnd to max again it takes a long time for the manpower pool to get big again.
- Army maintenance
why is this bad? :
armies (normaly 10.000 men per unit) have lower max soldiers. if suddenly a war breaks out you neet to set arm-maint back to 100% again and "repair" your units to have them full strength again.
- Navy maintenance
why is this bad? :
ships (normaly 100% strenght) have lower % of strength . if suddenly a war breaks out and you want to have your ships stronger you need to set nav-main back to 100% again, go to a port and wait a couple of weeks until they are "repaired" back to 100%.
- tariffs
why is this bad? :
high tarrifs raise conciousness of all your people. that means if you are a monarchy they start to hate you over time.
- klick your trade screen and deactivate "let computer handle trade". then set all your resources to "sell" if the computer had them to "buy". like this the compi does not start to buy stuff like mad.
why is this bad? :
you need to check the trade screen from time to time and buy items yourself in case you or your factorys need them. some people dont like this
- klick your "politics" tab and choose "political reforms - public meetings - NO" this makes crime fighting less expensive.
why is this bad? : democratic people (high conciousness) do not like it. the other ones do not care.