WADA doesn’t do its job properly

Recently Alan Abramson published an article where he noted whether tests conducted by the World Anti-Doping Agency (WADA) were efficacious.
The WADA conducts more and more tests for steroids and other related drugs each year. It seems that those that dope are caught. One may think that the world of sports and bodybuilding will be soon cleansed from usage of prohibited preparations. For example, numerous tests for banned medicines have been conducted at the 2012 Olympic Games.
But certain questions appear here. Are these tests sophisticated enough to detect any athlete that dopes? Are these tests efficient?
Let meditate over results of several tests. In 2010 the WADA publicized statistics according which 258,267 samples were analyzed by 35 WADA-accredited labs. Out of these samples 4,820 results represented atypical findings. Circa 60 % of positives indicated about application of steroids. Numerous positives were for cannibinoids. 10 % positives indicated about usage of marijuana. As you see, only 60% out of those that used banned medications applied steroids. Is it real? Don’t manifest the results of the tests that the WADA doesn’t do the job suitably?
The former president of the WADA Dick Pound believes that at least 10 % of sportspersons who took part in the 2012 Summer Olympics applied steroids. He notes that those steroid users that are not clever are caught by anti-doping agencies. He also notices that a sportsperson who has been caught taking forbidden preparations will fail an IQ test. He concludes that only unwise sportspersons don’t avoid detection.
Thus, when you hear that the WADA has conducted many tests to make sports clean, think whether these affirmations are true. Has the WADA ability to make competitions fair? Why does the WADA publicize about number of tests?
It seems that the WADA only wants to convince people that the job is done suitably. The WADA put efforts to secure future funds. This is the reality.