Indeed. But how to do that?
I think we need to realize it's a two-way street. People with economic ambitions are desperate to influence government because government has so much power over their success or failure. With regard to separating church and state, this was the genius of the founders who sought to limit religious influence in government. They realized that the best way to keep religion out of government was to limit government's ability to interfere with religion. Likewise, when government can no longer be used by ambitious people to enhance their own wealth, there will be much less incentive for them to use their wealth to influence government.
You stated money needed to be removed from the system. You can't remove it. You can require a great deal of tracking and reporting. That means we all are going to see more personal financial iinformation released and I correctly mentioned that reduces privacy/liberty.
Only if government is allowed to pick winners and losers. In such a system you can send a whole battalian of auditors to Washington to see who is using the money for what and never get a handle on it.
But if you restrict what government can use the money for rather than try restrict who is allowed to have it, you pretty well fix the problem. When they can't use our money for their own benefit, the incentive to try to get more and more of our money is removed.