I think you have to control the materials to an extent, but it's important to let the materials have a kind of power for themselves; like the natural power of gravity, if you are painting on a wall, it makes the paint trickle and it drips; there is no reason to fight that.
“Taxpayers will not stand for - nor should they - the funding of poster sites, leaflets or advertising. What people will support is funding for political education, for training, for party organization.”