His end goal, as is abundantly clear by film’s end, is to create a desire in the Republic for a regime change; to unseat Chancellor Valorum. So Palpatine/Sidious manipulates the symbiotic nature of Republic trade and economic relationships, for lack of a better term, to create war between members, weaken leadership, and see himself installed as chancellor.
As I noted in my introduction, an important critical requirement for any film is that form must in some fashion reflect content. Imagery should buttress, reflect, or augment our understanding of the story presented. A good film can’t merely carry deeper meaning around on a character’s tongue…or else the movie becomes radio with pictures. And yet surprisingly few films these days effectively manage this (necessary) feat; to truly deploy visuals in a manner that makes pictures convey thematic meaning.
On the other hand, as my review of Return of the Jedi pointed out, the franchise's overt appeal to childhood set legitimately started there, with all the burping aliens and Ewoks. That's a bit of a shift from Star Wars and The Empire Strikes Back, but not one you can blame The Phantom Menace for instigating. At this point, it's a fait accompli. Selling toys and bringing in the kids is a marketing strategy.