1) from September 2007 all the state benefits to such groups, as elderly, disabled people, immigrants, students and victims of the Chernobyl disaster, were cancelled by a presidential decree.

they were cancelled by a law

2) The economy of the country belongs mostly to the black market sphere

The economy of the country is based mostly on big state owned industries such as oil rafineries. But presidential enterprises and friendly foreign “investors” are obviously connected with black market sphere.