To be fair, while the structure is a bit weird on the face of it, there's
a good reason. Namely, a consortium such as W3C is highly vulnerable to
litigation on antitrust and restraint-of-trade; anyone whose business
plan goes up in smoke because the W3C blessed something incompatible might
be inclined to sue, whether or not this is reasonable, simply hoping to
be bought off. If you look closely, legally, the W3C hardly exists
at all - there is a structure of contracts with MIT, Inria, and Keio,
and the decision-making is de jure done by one individual whom it would
be worth no-one's while to sue.
In practice, the W3C management and staff do pay careful attention to
the views of its members. -Tim