Not sure what you think a list of entry level contracts, league minimum players, and contracts signed under different caps with their single season raw goals proves, but it doesn't really have anything to do with the discussion that was being had. Based on goal scoring, at time of signing his post-ELC contract, he deserved the biggest post-ELC contract in the entire cap era. He did not get that. Not to mention that based on goal scoring, he would deserve to be the highest paid player in the league, and he is not. If contracts were only based on goal-scoring ability, then the contract Matthews signed would have been historically great.
All of this is pretty irrelevant though, because contracts are not based on just goals. By actual methods of contract valuation, he was properly paid.