our current representatives just don't think of these "unique" and possibly even good ideas?

I think our electoral system is broken, so whether our representatives think about them is irrelevant, it's not getting passed unless it fits with the party strategy. And sometimes the party strategy is to cozy up to the fossil fuel industry or whatever.

I'm under no illusion about that.

My point is that this isn't some problem inherent to "rich people" and making rich people poorer won't solve the problem. The problem is a huge mess of issues that all work together to reward backroom deals, and that's the kind of thing larger organizations like corporations, labor unions, and PACs have the time to deal with. And that's the nature of things anytime there's high stakes, like with government power.

Everyone will have their pet solution(s), be it electoral reform, campaign finance reform, term limits, etc. Those are all well and good, but as long as there are rewards for hiding loopholes in the legal code, it's going to be a problem. So my solution is more of a perspective that we need simpler, more easily audible laws, and the way we get that is by restricting the types of regulations we can enact (e.g. the government shouldn't define the difference between a light truck and a passenger vehicle, all vehicles would pay a carbon tax, as well as a weight-based road fee). Unfortunately, that's not possible until we do some of those reforms (my preferred starting point is electoral reform, such as ending FPTP), and even then it's going to be an uphill battle.

Regardless, my point about rich people not being the problem stands, they're merely a symptom of a larger problem.