Switzerland has the same problem. If the rent increase has been determined by market conditions to be 10%, incumbents have their rent increased by 40% of that,

Switzerland has the same problem. If the rent increase has been determined by market conditions to be 10%, incumbents have their rent increased by 40% of that, so 4%. And it's not asymptotic. If the rent increase next year is 0%, the incumbents still pay just 104% of the basis rent. Over time, incumbents have unbeatable rent and can't afford to move, and newcomers pay an extortionate amount, which is the present status quo. The Swiss also blame the newcomers for raising the rents, even though they are the victims.