1968 Theodore Roosevelt NCS Sterling Medal

The reverse had me stumped as I had never heard this as something that Teddy Roosevelt said.
I have found it was a political cartoon by Thomas Nast in drawn in 1896.

Theodore Roosevelt rides a bucking horse called "Spoilsman" wearing a saddle inscribed "Civil Service Reform."
In the background is a cabin titled "Uncle Sam's Ranch, U.S.A."
Roosevelt's hat has flown off his head, and a paper slips from it which says, "The Commission means business. T.R." At bottom right is the caption, "Stick to your saddle and don't be bounced." and signed in 1889.
That was during the Spanish American War era and "The battle of San Juan Hill" but this is about Civil Service Reform.
Theodore Roosevelt was The Civil Service Commissioner at the time.
U.S. civil service reform was a major issue in the late 19th century at the national level, and in the early 20th century at the state level. Proponents denounced the distribution of government offices—the "spoils"—by the winners of elections to their supporters as corrupt and inefficient. They demanded nonpartisan scientific methods and credentials be used to select civil servants.