I'll just riff on some ways a big program requiring pollinator plots could help reverse the insect apocalypse ...
* New developments often have rules about keeping a certain percentage of trees on the site and devoting a percentage of land to greenspace. Require that a portion of that greenspace go to pollinator plots. If the development includes a borrow pit or swamp for managing runoff, the pollinator plot can be located in that area, and the insects will have convenient access to water and mud.
* Require that a percentage of municipal parks consist of pollinator plots. These make gorgeous places to walk through and watch insects, not to mention the wildlife that follows them, such as meadow birds. Simply mow a different random path every season and plop a few portable benches and shades along the way. If people worry about beestings, diverge plantings designed to attracts bees from those designed for butterflies and other pollinators, marking them accordingly.
* Establish county, state, and national parks to be managed for pollinators and other insects. Decorate as above, with the addition of a visitor center to educate people about insects.
* Require farmers to devote a percentage of their land to pollinator plots, with a shelterbelt to protect the plot from agrochemicals. Either give them a cash payment for doing so or some sort of tax benefit. Since bees pollinate a third of our food supply including most of our produce, paying people to farm bees is an excellent investment in the long-term survival of civilization in particular and Homo sapiens in general.
* While we're at it, offer cash grants and/or free seeds to anyone who has enough space to plant a pollinator plot. Scale the offerings to the size of the plot. People with lots of space should get credit if they choose to devote much of it to cultivating insects.
* Coordinate this effort with bird habitat plots. Bird populations are also plummeting, due to such things as habitat loss and disappearing insect prey. Many birds prefer brush or forest habitat, so synchronized efforts could attract birds in a brush or forest patch beside a wildflower meadow or prairie for insects. Similar tactics as above could parallel the bird plot and pollinator plot programs.