There is no limit to the increase of material desires. This is how it works: if one obtains a desire, then he gets poked by the thorn of disappointment. By that he is forced to look forward to still another desire, and in this way one keeps on continuously moving on and on from one desire to the next.
"The search for wisdom is a great challenge; to act on wisdom is an even greater challenge."
— Jagad Guru Siddhaswarupananda