UNISON members held a protest outside County Hall in Northampton, following changes to their terms and conditions proposed by Northamptonshire County Council.
The protest was held before the full council meeting yesterday, in response to changes introduced on September 1 in a bid to save £4 million a year.
UNISON branch secretary Steve Bennett said the changes means if staff are off sick, they will not be paid for the first three days.
And he said staff on long-term sick pay used to get six months’ full pay and six months’ half pay, but now get 12 weeks’ full pay and 12 weeks’ half pay.
Mr Bennett said: “We have made it quite clear that this won’t save £4 million a year. What they are doing with these changes is taking away from us for the rest of our working lives.
“We are willing to negotiate a £4 million saving which could be done without altering terms and conditions.”
Councillor Bill Parker (Con, Clover Hill), cabinet member for finance, said: “As a result of the funding situation, the county council has faced, and is continuing to face, significant budget challenges.
“In very simple terms, reducing costs in employment is very easy. We either pay them less or employ less. That would have led to the loss of 250 jobs, which we consider unacceptable.
“We will be realistic. We would not say employees are happy with the outcome. But we have been talking to UNISON for over a year and there were no other suggestions.”