Answer:
Economic policy Aggressive tax and debt collection Political corruption and cronyism
More than anything, the Spanish were seeking wealth.
Christopher Columbus himself thought that he had reached India: he wanted the wealth from the trade with Indians.
In the beginning, the Spanish hoped for Gold and Silver, later also for other products that could be made cheaper in the New World.
In short: the Spanish were not interested in Mexico but in what the ships could bring from Mexico (again, mostly gold).
Some, very few Spaniards, who settled in the New World were too unhappy in Europe and hoped for a better life.
Die in committee or subcommittee, where they are pigeonholed, or simply forgotten and never discussed. If a bill survives, hearings are set up in which various experts, government officials, or lobbyists present their points of view to committee members.
All 13 were needed to pass those.
