Representation isn't equivalent to consent, and dilution with seignorage granted to someone else is just redistribution.... and shareholders have motivation to invest time and resources to grow the value of their investment voluntarily.
If transaction fees are insufficient I'd suggest convincing shareholders to reinvest directly and voluntarily. Allowing even a majority of stakeholders the discretion to dilute the stake of the minority without their consent is problematic.
I think you are worried about some kind of tyranny of the majority if elected employees were allowed to issue new shares. I think what you have to keep in mind is that there is very little motivation for a majority to try to take advantage of a minority or "redistribute" money to themselves because there is just nothing keeping the minority there. It's just too easy for them to take there support to a DAC that isn't majority owned by stupid A*holes. And then those majority owners become majority owners of a whole lot of nothing.
It's just like if the US government tried to buy up half of bitshares X and then control it. All they would do is put a bunch of money in peoples pockets who would then proceed to fork the DAC without the government stake honored.
A DAC is a FREE ASSOCIATION of people who's interests are aligned.
Our current representative government has problems and opportunities for abuse and corruption but a huge part of that is because of the barriers to entry/exit/participation. If you have to take time off work to vote and then sometimes stand in line for hours and then someone makes a law you don't like, what can you do? You can't say well "count me out" I'll not be following these laws and will just join this other group instead.
I think the larger a DAC became the more you would find how ineffective relying on volunteers to do things to boost everyone's value would become. If you own 1 millionth of a DAC are you going to take time out of your day to grow the market cap of that DAC just so you can get 1 millionth of the fruits of your labor?
The key to decentralization is low barriers to entry and competition. I fully suspect that if the majority went some stupid direction then the fall in the value of the shares could outweigh the benefits. I think that all of these things are worth considering and as much as I hate 'inflation' in monetary systems backed by force, so long as there is competition the market will work things out.
Centralization isn't even really so much a problem with low barriers for competitor entry. The issue is that this system needs to be designed for the long term, and as it succeeds and becomes more widespread, the barrier to entry increases due to the difficulty of achieving competitive network effect. Because of this risk, I think great care should be taken before designing it in such a way that users may be forced to choose between enduring mild (or gradually increasing) oppression at the hands of the majority and abandoning the network and starting a new one. The network will put down roots, and the the inertia that must be overcome to replace it will be significant. Look at the current banking system, or even Bitcoin. The fact that other solutions are technically superior isn't enough to replace an entrenched network. It can still be done, but not until the disparity is quite wide and obvious it seems.
Also, particularly earlier on, and to those who don't spend hours debating these issues on the internet, splitting the network, or even a discussion of possibly needing to split it can shake confidence in the system. Deliberately programming in potential exploits requires significant justification in my opinion. Would anyone here support allowing delegates to confiscate funds selectively from particular addresses? I think most of the same supportive arguments apply.
Once the DAC is too large to rely on volunteers (including initial AGS startup funding that's already being provided), I think transaction fees should be sufficient to cover expenses. Transaction fees are the cost payed by customers. If the business is too large and established to attract voluntary investors for growth, and too unprofitable to sustain its operations on what customers are willing to pay for service, I think we should either accept failure gracefully and try again, or try to convince the shareholders to deliberately engage to save the business. Looking for murky semi-coercive alternate revenue streams seems like a bad answer.