All that sounds very cynical and depressing, I know. But the aim of the public must be to increase the number of interchangeables, and minimise the power of the essentials.
Think of it this way: if I run a city of 100,000 people giving me $100 million in revenue, with a dictatorship I just need 100 guys with AK-47s and everyone else unarmed and I can run things as I wish - I can give each of those 100 guys $500,000 - it's not hard to find 1 man in 1,000 who'll shoot unarmed protestors for $500k - those 100 guys are essential to my rule. That then leaves me $50 million for the public good or to sock away in my Cayman Islands account, depending on my nature. Of course if I spend $50 million on the public good then someone has to be in charge of those projects and he... becomes influential, maybe even essential. Hmmm. Easier to put it in my bank account. Things aren't looking good for those 99,900 other people.
Now, if my city's a democracy, if I just give $500k to 100 people and keep the rest for myself, I'm definitely out the next election. I need the support not of 100 people, but of 50,001 of those people to stay in power. I could just give them $2,000 each, but since they already paid $1,000 in tax they're only $1,000 better off so they might not be that impressed by that, who knows which way they'll vote. It's probably easier if I take that $100 million and spend it on public projects, schools and roads and things. I'll end up with some influential people but the interchangeables will mostly like me.
Obviously I can do the things we talked about before, gerrymandering and reducing the franchise, or rewriting the constitution to reduce the powers of the council of the 100,000, that sort of thing. And then I just start spending on a few, to hell with the rest of them.
For the public good, then, we want to increase the franchise, and have as many people as possible involved in things. You know how you get people saying, "well, people who didn't even finish high school, why should they be able to vote? they're too stupid." This is just a variation on denying ethnic minorities the vote and all that. It's just people trying to reduce the numbers of interchangeables, or whichever group they're in - Cabinet members all agree there should be a smaller Cabinet! - to increase their own relative importance and thus rewards. Ignore all that shit, then.
Much the same applies to corporations. Excessive CEO pay? No amount of legislation will change this - they pay lawyers thousands of dollars a day to find loopholes in it to get another way to get the sweet, sweet moolah! But imagine... shareholders... no more proxy vote... and shareholder meetings can only pass any remuneration with a quorom of 2/3 of shares... hmmm... watch that CEO pay drop like a stone.
Increasing participation in an organisation or government evens out the rewards. Reducing it concentrates them.