ICE has more funding now as a domestic law-enforcement agency than almost every military on the planet. If we need to fund the "arrest of illigal immigrants" to

ICE has more funding now as a domestic law-enforcement agency than almost every military on the planet. If we need to fund the "arrest of illigal immigrants" to such an amount as this, can you please explain to me how other countries, as you mention in your comment, can successfully do this with nowhere near that amount of funding?