Historically, Sherlock has relied on the Homeless network/Baker street people. While he said they are more open to taking bribes, that doesn't necessarily mean the select ones that he trusts would 'sell him out'. It's one of the features of the whole Holmes thing; the street people are loyal to him. They would know that he is alive and would stay loyal as he would have to use their services again and again while hiding.
It's sometimes odd to find that street people have a stronger moral code than the average banker or politician, lol.
And let's face it, if Mycroft set up the 'fall' Sherlock would have been seen wafting off in teh breeze holding an umbrella 'Mary Poppins" style!
____________________________________________________________________________________________
Also, please note that sentences can also end in full stops. The exclamation mark can be overused.
Sherlock Holmes 28 March 13:08
Mycroft’s popularity doesn’t surprise me at all. He is, after all, incredibly beautiful, clever and well-dressed. And beautiful. Did I mention that?
--Mark Gatiss
"I know that you believe you understand what you think I said, but I’m not sure you realize that what you heard is not what I meant."
Robert McCloskey