Clay and Gravel Liquefaction for Paver Installation
You’ll continue to have that “liquid” action until you remove the water. 

I’d provide a way for the water to “runoff”, like a perimeter drain, drain rock at the perimeter, etc. that will remove the excess liquid. (I’d make sure the drainpipe extends to a ditch or something, to carry the water away. Water will run in the direction of least resistance.)

Your Class A gravel will give you a good base and the sand will provide a layer for you to set the bricks level, but I’d provide a filter fabric between the sand and the gravel. Otherwise, the fines in the sand will “wash” down into the gravel and the bricks will soon be uneven.