welcome to the forums, MakroDel - balancing our income in coins/supplies is part of the central strategy of the game, so (although it's been suggested before) it would make the game way too easy and therefore less interesting.
for the future, when you suggest ideas, there's a template you need to use:
http://forum.en.forgeofempires.com/showthread.php?1385-How-To-Submit-Ideas
but since this isn't going to make it as an idea proposal, you don't need to use that. instead i'll move your thread to the general discussion section, where it will have more of a chance of thriving.
have fun!