Due to the exponential growth of experience required per level and the hard caps of 1024 on experience multipliers, higher levels of perk experience are essentially impossible to achieve before the heat-death of the universe, except using the console command to grant experience.
Consider adding a configuration option for the maximum amount of perk experience a new level can require, defaulting either to being disabled, or a number around 1 million, so the difference would not normally come up before the default level cap of 30, but would provide an option for getting up to level 100 legitimately attainable.