In addition to not getting paid, the employees are left with a tax burden for the RSUs they are now unable to sell since the cancellation happened abruptly in the window between vesting and the liquidity event.
No, to clarify the salary is being paid but the stock liquidity program ended. However, single trigger RSUs mean tax may still be owed on those RSUs at the market value when they were issued.
So some people owe tax on eg $100k in extra “income” for shares they can’t sell anymore.