[7][8] He continued to advocate for First Nations people with a 1967 article in Saturday Night magazine that criticized the government for restricting them to reserves rather than allowing them to own private property,[9] and with the 1971 publication of his book Welfare: Hidden Backlash: A hard look at the welfare issue in Canada; what it has done to the Indian, what it could do to the rest of Canada.

[19][20] Shumiatcher frequently lectured and wrote on "literature, the arts, philosophy, law, human rights and obligations, the monarchy, politics and international relations".

[28] Shumiatcher began collecting art in his twenties; he returned from his study year in Japan in 1941 with "masks, woodblock prints and kimonos".

After their marriage in 1955, he and his wife Jacqui amassed what was later termed "one of the most significant private collections of Inuit art in Canada".

[31] Shumiatcher's high profile in Western Canada, fueled by his successful law practice and prominent social status, made him the target of criticism in the legal world, which "perceived [him] as unconventional, flamboyant, and something of a gadfly".

[34] In 1964 the Court of Appeal for Saskatchewan set aside the conviction for conspiracy, citing "manifest error by the trial judge".

[34] Shumiatcher served as president of the Norman Mackenzie Art Gallery, the Regina Symphony Orchestra, the Royal Commonwealth Society, and the Duke of Edinburgh Award Committee for Saskatchewan.

He was also a member of the National Council of the Canadian Bar Association and was an honorary solicitor of the Regina Press Club.

[1] Shumiatcher served as an honorary consul general for Japan and Dean of the Consular Corps for Saskatchewan for 14 years.

[1] He was appointed King's Counsel[a] and was the recipient of numerous honours and awards on the provincial and government levels, including the Order of Canada (1981), the B'nai Brith Citizen of the Year (1991), the Canada 125 Medal (1992), the Distinguished Service Award of the Canadian Bar Association (1995), and the Saskatchewan Order of Merit (1996).

[1] In 1947 Jacqueline "Jacqui" Fanchette Clotilde Clay was hired as secretary to Shumiatcher during his employ as senior legal counsel in the provincial government; after leaving this position, she helped set up his private law practice.

[21][2] Jacqui established a managerial company to handle staff hires and office management for Morris' law firm.

[21] They resided at 2520 College Avenue in Regina, purchasing in 1956 a two-storey Picturesque Eclectic house originally owned by Maughan McCausland, also a lawyer.