What a load of misleading drivel! Tigger_Too is spot on - NATO as an organisation does not pay any national military personnel any bonuses, or salaries. I can guarantee that as I used to be heavily involved with UK budgets in NATO. They do employ civilians who are international ex-pats but that's another story. So the common NATO pot does not bolster the NL colonel or anybody elses take home pay. Many individual nations pay operational pay, NATO pay, etc but that is a national issue.
The UN do reimburse as noted by some commentators. For some nations this is good news for the UK it all goes into Mr Darling's accounts.