The Tribunals had many problems since their creation, as the judges rarely had any formal training and were basically politicians elected each year. With the progressing degradation of Polish political system, in the early 18th century the Tribunals became as corrupted and dependent on the magnates as the Polish parliament, Sejm. Several minor reforms had little effect until finally, the Tribunals were subject to a major reform by the Great Sejm of 1788-1792. However those reforms, along with the Tribunals themselves, were soon annulled in the aftermath of the partitions of Poland.