"...will come from the increased pay and the 'multiplier' effect that will increase pay for thousands more."

What island do you live on, because in Hawaii today, we have inflationary costs of anything imported, food, health care, utilities, and taxes - all going up. It's rare to hear about wages going up due more people competing for the available service jobs.
If a non-competitive government worker receives more pay due to a rise in taxes, then many taxpayers have less to spend. It's a closed system, especially on an island.
Rising pay for government workers creates winners and losers. Government workers provide a service that is valuable to everyone. The question arises should their health care and pensions far exceed those of ordinary taxpayers?