Given the only sources that mention this strategy being used at all are far right I'm going to go ahead and say 1) there is zero real proof this strategy is being applied and 2) there is zero evidence that "the left" supports this strategy.
You have some numbers to back up the assertion that the majority of left leaning people support the collapse of welfare via overloading in order to bring about a national guaranteed wage or did you make that up?
I personally doubt this is the work of some vast right wing conspiracy, more likely it is an obvious LOLs target given how much it has been in the news lately. If it was a right wing thing it would likely be the work of one or two crackpots not some RNC funded item. Obama has already shot himself in the foot, getting your fingerprints on intentionally making it worse is a massive gamble with little payoff. I also doubt it is some DNC funded effort for largely the same reason, massive gamble small payoff.