Pay shouldn't just continue, it should increase exponentially at a rate that outpaces inflation by enough to disincentivize maintaining it. Make it compound monthly at 200% APR.

Might be worth 3 years of pay to keep someone silent and idle for 2 years in some exceptional cases, but 7 years for 3 years would be exceedingly rare and 15 for 4 would be unheard of.

I'd be happy to sink all my time in my hobbies for 200% APR exponentially growing pay as long as anyone would like.