GMB union members served up a "corporate Asbo" to "anti-social" coffee chain Starbucks as part of a protest outside the US giant's London offices today.
The union was highlighting the firm's refusal to pay the living wage of £8.55 per hour in London and £7.45 across the rest of Britain.
GMB national equality officer Kamaljeet Jandu said: "Starbucks is seeking talks with HMRC because they have been exposed for not paying their fair share of corporate taxes.
"They must be made to pay HMRC what they avoided paying."
GMB members working for Starbucks are also concerned over apparent plans to cut terms and conditions on paid 30-minute lunch breaks and paid sick leave for the first day of illness.
And it is feared that some staff will see pay increases frozen, while cuts in maternity benefits are said to be imminent.
Mr Jandu added: "Starbucks are a million miles away from empowering their staff and helping them exercise their rights to join a trade union and have it recognised.
"They really are an anti-social company."
today's protest at the company's London office will be swiftly followed by further action at two of Starbuck's flagship stores this Saturday.
GMB has rallied its members to take part in UK Uncut protests that will see activists attempt to turn two stores near Regent Street into services women depend on such as refuges and creches.
UK Uncut claims that if the government took action to prevent tax-dodging by companies like Starbucks it would not need measures such as a £5.6 million cut to services preventing violence against women or a 25 per cent cut to funding for Sure Start centres.
Spokeswoman Anna Walker said: "I think we're seeing a very real change in people's understanding of who is to blame for the problems we face at the moment.
"Everyone is being told we should be in this together but big businesses are getting away with not paying their fair share."