The answer to these questions is: not necessarily. In fact, for many recipes, the answer is a resounding, "No." This confusing situation is the result of the word "thick" in English being used to describe two different things. "Thick" when used to discuss a solution is being used to mean viscous/slow-flowing. "Thick" applied to a bubble refers to the thickness/depth of the bubble's walls. Viscosity and bubble wall thickness do not have a direct connection. In fact, they sometimes have an inverse relationship. You can have thin, watery solutions that create thick-walled bubbles and very viscous solutions that create thin-walled bubbles.