"This is a weak and unfair decision." - Opposition Leader Bill Shorten.

"When it comes to the history of penalty rates, Bill Shorten has a glass jaw. What he does need to acknowledge is his role in it and the fact that it is either an independent commission or it is not," Employment Minister Michaelia Cash.

"Labor and the crossbenchers have a decision to make: will they side with the Liberals and stand by as people's penalty rates are cut, or will they join the Greens to protect people's penalty rates in law?" - Greens industrial relations spokesman Adam Bandt.

"A reduction in penalty rates is likely to lead to increased trading hours, an increase in the level and range of services offered on Sundays and public holidays and an increase in overall hours worked." - Fair Work Commission president Iain Ross.

"This is no longer the lucky country. Who gets picked on every time? The ones that cannot afford it." - retail worker Evelyn Kathner.

"Employers did not get everything we were seeking, but today's significant decision makes some important progress in helping these businesses be open when people need them." - Australian Chamber of Commerce and Industry chief executive James Pearson.

"Many students, particularly those who study full-time, have no other choice than to work weekends to meet the outrageously high cost of living." - National Union of Students president Sophie Johnston.

"People expect our shops to be open every day of the year other than Christmas Day, Good Friday. This is not the 1950s where Sunday was sacrosanct. The world has changed." - Tourism Accommodation Association chair and former ACTU president Martin Ferguson

"The Fair Work Commission's decision to radically cut Sunday and public holiday pay will give almost one million Australian workers a huge pay cut. This is a loss of up to $6000 per year for some workers." - ACTU president Ged Kearney.

"I do not accept the argument that the Fair Work Commission is going to dismantle our penalty rate system. The evidence does not support it. It is not going to happen." - Opposition Leader Bill Shorten before the decision came though in June last year.

"This cut comes at a time when wages growth is at a record low - Australian workers need a pay rise, not a pay cut." - SDA national secretary Gerard Dwyer.

"The commission has recognised that existing Sunday penalty rates in the fast food industry are not fair for employers and no longer relevant." - Australian Industry Group chief executive Innes Willox.

"There is an indisputable link between the cost of wages and a business's ability to hire more workers and give existing staff more hours."- National Retail Association chief executive Dominique Lamb.

"Lower wages will not lead to lower prices, they cannot boost consumer spending, and they will not create new jobs. This decision will undermine economic growth and job creation even further." - Jim Stanford, director of the Australia Institutes' Centre for Future Work.