Despite being the driving force behind the revolution, workers in Iran are as bad off today as they were under the Shah.
Traditionally, May Day has been a day of protest for Iranians, however the Islamic government has cracked down on unions and their leaders even throwing some in jail to keep them from organizing for the event. Here are some accounts:
A May Day Message of Solidarity to Imprisoned Iranian Workers http://www.freedomessenger.com/a-may-day-message-of-solidarity-to-imprisoned-iranian-workers/
Today is May 1, the International Labor Day. This day is traditionally observed in Iran as "rooz-e kaargar." Over the past several years, however, it has been almost impossible for workers to observe this day through holding any protests. In fact, each year, shortly prior to May 1, labor activists are rounded up and arrested...
There's some good news though: "Victory for oil workers on strike"