If you’re a taxpayer, you have almost certainly helped pay for a donation to the Sanders campaign
Of the $209 million given to the Vermont senator’s campaign, about one out of every four dollars came from those not in the workforce, who include the unemployed or retired.
Just a graphic breakdown of his supporters here.

So if you are working and paying taxes, you have good reason not to like the socialist. You are already being forced to fund his campaign. What’s more those people that are volunteering you’re providing them their wages to do it.