The name on that is wrong. The document clearly says "In Scotland" not "At Sheriffmuir". Dutch, and if memory serves, Swiss, troops were recruited by the British Government as the British Army had been massively downsized when involvement in the War of Spanish Succession ceased. The giveaway, as well, is that it lists Cadogan, who didn't got to Scotland until after the battle.
As for Scots/Irish mercenaries overseas as opposed to Scots aristocrats and descendants, the situation was very different. The Jacobite Risings were about a split in the ruling classes. If you lost out, then you fled to France (if you were a Catholic) or to the Netherlands (if you were a Protestant), a fine tradition going back to the start of the Reformation.