If I ran the zoo

As citizens in a democracy, all of us, to one extent or another, are amateur politicians.  As such, most of us have some kind of policy platform, or at least a wish list of changes we’d like to see in our laws and the functioning of our government.  Some of these changes are ideologically partisan, while others seem pretty broadly common-sense.

So here’s the prompt: if you could make three changes to US law and governance - with absolutely no feasibility restrictions whatsoever - what would they be?  Why?

And then the follow-up: is there any unifying reason or reasons that is keeping these changes from happening?