I think having a dispatch mission that gains some better credits would help ease the problem, right now the best I have noticed was the space junk, and that is like a 100 per month, while even the standard attack missions take even half of the that time and give you like >1000 credits.
I get getting 20k means only 10-20 mission, but its like... I wish we could push all those tiny missions into a single one.
Like... I had the Burlust being completely sieged by Acutian ships (As in, cant see the planet below in the map) and defending them meant killing 2-3 ships out of like... 200, I get its so we dont get overwhelmed, but I kind of wish we could, in the mission selection, say how many we want to take on, the more we take on, the better rewards and influence (We are being brave and high risk = high reward), not only I would find them much more fun, and less tedious than to repeat +30 times in a row, but actually lets me make a dent in their forces.