Realistically speaking, I have never seen uniforms being used a means of exclusion amongst Scouts - obviously, nobody is going to send a Scout home because he doesn't have a uniform. But as Baden-Powell put it in the 1908 edition of Scouting For Boys:
The Scout kit, through its uniformity, now constitutes a bond of brotherhood among boys across the world. The correct wearing of the Uniform and smartness of turnout of the individual Scout makes him a credit to our Movement. It shows his pride in himself and in his Troop. One slovenly Scout, on the other hand, inaccurately dressed may