First only gross receipts over $25 million are taxed at 2.5%.  So C-Corp A sells $25,000,100.00 and pays a tax of $2.50.  OMG must raise prices, make uppity consumers pay not downtrodden shareholders.  Now gross receipts are $25,000,102.50.  Oops now $2.56 tax owed, must raise prices.
This is a GROSS receipts tax.  Companies can raise prices to cover it all they want.  All they end up doing is paying more tax and eventually pricing themselves out of the market.
I agree that we have a surfeit of administrators and a badly thought out PERS.  It sucks that so much of the revenues will likely be wasted on them.  Reality is that if companies didn't keep finding ways of squirming out from under their responsibilities to the workers, consumers and nation that makes their wealth possible we wouldn't be having these arguments and  I wouldn't have just replaced tires destroyed by bad roads or be looking to home school my kid in the hope that she'll never be ignorant enough to vote Trump.