Hundreds of workers at Argyll and Bute council are striking and working to rule over their single status pay deal.
Members of the Unison and Unite unions say that industrial action is the only way to persuade the council to reconsider its imposition of the pay grading structure.
Some workers stand to lose between £5,000 and £6,000 a year under the council’s single status deal.
Unite has called strikes of different sections of its members at different times from Tuesday of next week.
Tony Devlin from Unite said, “This will have a massive effect on council ferries, roads, waste collection, home care, burial services and schools.
“Unite members voted overwhelmingly in favour of industrial action in response to the council’s attempts to impose new terms and conditions and pay structures rather than to sit down with the union to reach a negotiated settlement.
“It has repeatedly rejected our offers to discuss the issues facing our members and instead callously chose to threaten our members with dismissal if they didn’t accept the changes two weeks before Christmas.
“The leaders of Argyll and Bute council should be ashamed.”
Donald Brown, Unison branch chair, said that up to 1,700 Unison members would not be working more than their contracted hours.
He said, “In addition, those of us who use our own cars for council work will no longer do so. The council pays a mileage rate but depends on us making our cars available.
“If the council does not respond we will up the ante, and if they still don’t respond we will intensify it again, up to and including strike action.”