Canada just gives you a fixed amount of cash every year for the sales tax that they estimate that you paid on a regular amount of consumption (HST credit) which solved that problem.
I don't think it's fair that someone who earns $400k and spends $400k is paying roughly the same taxes as someone earning $400k and spending $100k. You should pay more taxes the more luxurious your life is, not the more productive you are.
Where's the other 300k going? If you aren't spending it, what does it matter if it all gets taxed to nothing? And if you end up spending it, then boom there's your consumption that needs to be taxed.