area and urged the disarmament of paramilitary Einwohnerwehren demanded by the Allies. The newly created second Sozialisierungskommission (commission on socialization) admitted some members from the left-wing USPD because Müller felt that only that way would the workers be willing to accept the commission's decisions. In social policy, Müller's time as Chancellor saw the passage of a number of progressive social reforms. A comprehensive war-disability system was established in May 1920, while the Law on the Employment of the Disabled of April 1920 stipulated that all public and private employers with more than 20 employees were obligated to hire Germans disabled by accident or war and with at least a 50% reduction in their ability to work. The Basic School Law (passed on 28 April 1920) introduced a common four-year course in primary schools for all German children. Benefits for the unemployed were improved, with the maximum benefit for single males over the age of 21 increased from 5 to 8 marks in May 1920. In May 1920, maximum scales that were established way back in April 1919 were increased. On 29 March 1920 the Reichstag passed a Reich income-tax law, together with a law on corporate tax and a capital-yield tax. The Salary Reform Act, passed in April 1920, greatly improved the pay of civil servants. In May 1920, the Reich office for Labour Allocation was set up as the first Reich-wide institution "to allocate labor, administer unemployment insurance and generally manage labor concerns". The Reich Insurance Code of May 1920 provided war-wounded persons and dependent survivors with therapeutic treatment and social welfare which had the objective of reintegrating handicapped persons into working life. The Cripples' Welfare Act, passed that same month, made it a duty of the public welfare system to assist cripples under the age of 18 to obtain the capacity to earn an income. The Reich Homestead Act, passed in May 1920, sought to encourage homesteading as a means of helping economically vulnerable groups. The Reich Tenant Protection Order of 9 June 1920 sought to check evictions and "an immoderate increase of rental rates", authorising the Laender to set up tenancy offices, made up of tenants and owners' representatives, with a judge as chairman to settle disputes concerning rents. As noted by Frieda Wunderlich, they were entitled "to supervise the fixing of rents for all farms". During Müller's last year in office, a number of Orders were