32k sounds like they are taking the p*ss. Generally speaking, an employer is not legally allowed to bond for more than the actual cost of what they're offering you - nice theory, it depends on what country you're in and whether some other poor soul has tested this in court to set a precedent. By cost, include sim time, course time, instructor time for checks, etc., so you'd be amazed how quickly it racks up.
I'd suggest also that the 5 years and non-reducing bond in the circumstances are also a dodgy ask legally. You need to talk to a pilot union or a local employment lawyer to check, well worth the cost if there is any given the amount you're being squeezed for.