That would not be his intent. His beef is with the corruption within the Democratic Party. He understands that Hilary has made an obscene amount of money through her high ticket political events, speeches and her "foundation." He sees rampant corruption and wants to eradicate it. He is rightfully frustrated. On the other hand, he thinks he can make nearly everything free. He may not be realistic, but he does not have the heart of a communist either.
Someone soulless could usher in communism, but not him---not intentionally anyway. However, I think Elizabeth Warren could usher in communism because she is an elitist who thinks she knows what is best for everyone else. Sanders is not an elitist.