The DSA bigwigs can do the math... they are just interested in getting power.
Once they do, it will be very hard to ever get them out again, as the Soviet Union and China amply proved. And after they do achieve power, it's promises schmomises.

Imma a Socialist Imma mathematical idiot.

We didn't achieve universal education by sending every kid to an Ivy League college or university with the taxpayers forced to pay the tuition or by forcing rich kids to pay both their own tuition and their poor next door neighbor's tuition.

But that's exactly what we are doing with Obama Care.

The socialists and people bad at math never understand the phrase " there's no such thing as a free lunch. "

Sadly the liberals can't do math so they don't understand these things.