What does "shipping rates should be hiked" mean?
This is the whole paragraph:
After talks on Wednesday failed to produce immediate results, government officials reportedly extended an offer to the drivers which would lower costs for their sector, allow for negotiations on shipping rates, and provide for a year’s worth of free financing. A representative for the truckers had previously suggested that if the fuel tax can’t be lowered, *shipping rates should be hiked*.
http://latindispatch.com/2015/02/26/truckers-protest-snags-brazil-highways-economy/