I haven't come across dirty hotels, but yeah you get far far less for your money in Australia than any other place I've traveled to. Almost all hotels are rip-offs. Nothing comes close to the luxury of Middle Eastern hotels or the value of Asian hotels. On the other hand Aussies are great at marketing and advertisements make budget backpacker hotels look like 3 star hotels. Almost every mom and pop run bed n breakfast has a very flashy website and most are even featured on popular TV travel shows.