"I live in hope that those with the largest stakes would wish to grow the value of their holding by voting for the projects they think have the best chance of taking Steem forward in the medium/long term."

You also have hoped that those with substantial stakes would actually curate, instead of extracting ~90% of rewards into their own wallets via manipulating rewards with those stakes. How'd that work out?

Hope springs eternal, and a sucker is born every minute. Human traits are predictable, and every part of EIP is designed to increase the profitability of profiteering, and that is also a feature of this funding mechanism for the SPS.

It isn't particularly hard to design mechanisms that prevent profiteering, and instead enable investors to rely on capital gains for ROI. Capital gains have encouraged investment for thousands of years. Profits have also been possible from hostile takeovers that extract the value of businesses while eliminating capital gains. Selling the means of production of a company whose stock is cheap enough can create profits. It destroys the value of the company stock though, as well as the company.

The means of production of Steem is creators, who cannot be sold. Their product can be profited from by the various mechanisms enabling stake to extract the rewards creators make possible, though, and we see that ~90% of rewards are extracted that way today. Now taxing that last ~10% of rewards can increase the extraction of rewards before they can create capital gains.

Guess what's going to happen? Well, you don't have to guess. You can simply predict that the same people are going to do the same thing for the same reasons that they have been doing, only they're now going to be able to get more rewards for doing it.

There's no point in hoping some words will change human nature. Reasonably preventing extraction of the economic value of content creation before it can increase the value of Steem is easily doable, and investors - not profiteers - have been provably investing for capital gains since prehistory.

HF21 is not going to change human nature, but is intended to enable the profiteers to extract even more profit. There are no experienced investors on Steem today, because capital gains are prevented. All substantial stakeholders have been, are now, and will continue to act as they always have, and parasitically extract every satoshi of value from the rewards pool before their competitors can. They have the voting power to effect what they want to see, and this is what they want.

I won't have hope until they've sucked every bit of value they profitably can out of Steem, and leave to parasitize their next target. Then maybe we can implement rational mechanisms to create capital gains and attract investors.