The argument is whatever you did to pay your taxes did not warrant a market increase from 200K to 450K including inflation. Therefore you made a abnormal gain on the rest of society you have not paid for yet from your house going from 200k-450k compared to other social benchmarks eg. big mac comparison etc... So at market rates if it suits you sell the house over 450K and get a house wherever the market permits with what you have in the social matrix or keep the house and lose whatever pension benefits deemed appropriate by the social parameters of fairness!
Why would you be entitled to a refund against other taxpayers? Why would you be afforded a recommendation? Ultimately you know what you want but you also need to be aware of what society permits and its tolerance levels.
People should not be surprised the baby boomer gravy train is declining after the population increase was permitted! It is not as if forecasters where predicting massive real wealth output gains from new people coming in and the decision makers must have released someone has to foot the bill and ever increasing debt will never wash when the youngsters had little say in it except being on the end of conception activities of predecessors that could not plan for their own future!!
I don't think general society want the baby boomers to be simply executed and assets seized because they have skewed markets to suit their generation!!