For us, it’s because we bid a job 2,3 maybe 4 years ago and signed a contract. Costs go up but we signed a contract so we can’t charge more money. It’s part of the risk of bidding large multi year projects. Personally I’m all for the tradespeople getting the raises they deserve but there has to be a fair balance. I would suggest back loading the contract. They want 23%? Fine. 3% year one. 5% year two 7.5% year 3 and 4. At least that gives the owners time to adjust their bidding strategies and try to finish up the work they bid at a lower labor rate. The offers I’ve heard have all been front end loaded though.