Although that is, strictly speaking, true; I cannot understand how controlling a Founder/Leader would need to be as to deny such a basic right to all Members. As you are well aware, progress is what GE is all about and I automatically grant this to all Guildies. Enabling the faster Players to open new Levels {if I or my fellow Leader are absent} simply makes it run more smoothly. Perhaps if Goods required are in sort supply, this might be appropriate but why be in such a Guild?!
To me, being a Founder/Leader is to provide guidance and goals and not to exercise Draconian control over the membership. Perhaps such demagogues do exist but who would stay with them without a gun held to their heads?