Goons scales in a way; if you can play multiples of them, their potential value increases logarithmicly (2 possible points from 1 goons, 8 from 2 goons, 18 from 3 goons, etc). But that only works in an engine where you can buy cheap cantrips or trash the gained Coppers with Watchtower, so it's not really like other Alt VP strategies.
Bishop and Monument can also scale if Throne Roomed. And of course there's the Golden (or Platinum) Deck, which sort of scales because you can play it every turn.
But these are engine strategies, which don't skew the way you play the game in the way that adding lots of VP cards to your deck does.