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I don't think this really solves the issue as you're just allowing more people into the current broken system, so prices continue to climb even faster. And anyone just getting their first property will be absolutely obliterated by any large interest rate increase.
You have to
a) build enough houses
b) stop allowing them to be used as an investment vehicle (→ implies ever-increasing prices)Either prices stop going up or your kids rent for life
Or allow mortgages using your years of successful rent paying as evidence of affordability