Central guidelines laid down by the CPC do not permit the public advocacy of the legalisation of prostitution. Arguments concerning legalisation are not absent, however, from mainland China. On the contrary, some commentators contend that legally recognising the sex industry, in conjunction with further economic development, will ultimately reduce the number of women in prostitution. Domestic commentators have also been highly critical of the PRC's prostitution controls, with a consistent Marxist-informed focus of complaint being the gender-biased and discriminatory nature of such controls, as well as human rights abuses. Some commentators in China and overseas contend that the PRC's policy of banning prostitution is problematic because it hinders the task of developing measures to prevent the spread of HIV.