Your foil hat is getting a bit tight. "They" (i suppose you mean the oppressive etsablishment, man) have literally nothing to gain from sending a rover to mars outside of any Scientifically-inspired discoveries. Politcally, this has already garnered a weath of (ignorant) aspersion which could have been avoided. Suprisingly, they arent actually looking for "little green men" but are in fact looking for any semblance of mirco-organisms or evidence that life could be sustatined on the planet - they are doing this to discover whether mars can be terraformed. If they come back with no notable or salient data (which they wont, as scientific endeavour rarely does) would it not only be more abashing to the government for endorsing the project?