What can I do? I don't like being a home alone cat

Dear George,
I think I need your help again. I'm worried (as you can see from my photo) that my human may be trying to leave me. She's doing this "phased return to work" thing and she's nearly at the point where she leaves me alone all day!
Back in the summer (I think the humans call it August) my female human disappeared for a full week and came back stinking of the human vets. She was very weak and couldn't do all her normal human duties, like feeding me and keeping my tray clean and she slept a lot. The male human took some time off work to look after her, but only a few days then the task was left to me.
I settled into the new responsibility incredibly well, even if i do say so myself. I would sit and watch her as much as I could. She spent a lot of time watching TV, on the computer or doing sitting down hobbies so I would try to get her involved in fun running and chasing games to keep her exercised. She seemed to enjoy this but would tire easily, so I'd give her a quick check over (you know, when you stand on them and sniff their whole face, paying lots of attention to the mouth and eyes) to make sure she was OK then we'd have a sleep together. I even checked out all the human vets that came to visit her, making sure none of them had thermometers in their bags and watching them closely, I wasn't going to have them check MY human's temperature! Gradually my care worked and she started to get better.
Then one day she started to get all excited about going back to work, just a few hours a week to start with (and as it was really cold and snowy out she made me a heat pad before she left!) but now it's every day and shows signs that she'll be gone for longer!
George, how can I show her that although I enjoy the new toys and treats she's bringing me, I do not want her going just when she's well enough to pay proper attention to me? It's just not good enough! OK so she always make sure I have tasty treats hidden around the house to keep me entertained as I try to get at them, and on cold days she'll put that heat pad in the big bed for me, but it's just not the same as being able to ignore her in person!
She and the male one make sure the spend at least an hour every day doing fun chase and pounce games with me, but I want one of them here during the day! What can I do to keep myself entertained (remember, I'm an indoor cat), and then REALLY let them know it's just not good enough when they get home?
Always your fan,
Mog.

Dear Mog,
What a typical sneaky human trick - to desert you after you have put so much time and care into helping her recover. Humans are moral morons. No wonder they are lower down the evolutionary tree than us cats. It would be easy if you had a cat flap. You would just wander down the street and find a stay-at-home senior human with good central heating and spend your days with him. These lonely humans are pathetically grateful for any attention and may even provide a superior brand of cat food.
Humans belong in the kitchen and the bedroom, serving us and not gallivanting about outside the home. You need a proper purrsuasion campaign to show them how bored and lonely you are. The first part of your campaign is to greet your humans with apparently pathetic enthusiasm. Yes, I know you are angry with them but dissemble. Be as sneaky as they are. Wind yourself around their legs, on the laps, climb on to their shoulders and flop all over them all the time. Do this while they are on the lavatory, while they are preparing food, while they are doing anything at all. Stick to them like a burr and interfurr with everything they do. If you can manage a sad little kitten mew, that will help too. Remember, this is a challenge to your acting ability.
If that doesn't work, start an "ignore and claw" programme. Ignore the scratching post, and claw the sofa and chairs. Tear up any paper found in the house and distribute it throughout the rooms. Move all small objects off shelves and surfaces. Hunt down and eat any food in the kitchen. If you have the strength to do it, push the cover off the butter container and lick. You want them to get the message that you need supervision.
The next part of the campaign is quite good fun. Hunt them like mice when they have gone to sleep. Jump on their feet, their groins and even their faces. Chew and pull their hair. Nibble their toes. Run up and down their prostrate bodies. Roar round the flat making as much noise as possible at about 3 am. The three fold message is - I miss you very badly indeed, I am bored during the day, I want to play more games with you. Night time is the only time I have with you.
If this doesn't purrsuade them, the potentially-suicide option is to spray. But I have known cats rehomed because of this, so it is a weapon that cannot be used lightly.
Best of luck,
George
PS. Fluffy and Cayenne have contributed this picture with the comment: "Just sit on her coat so she can't leave."
PS.My secretary has posted stuff about how to keep indoor cats busy on her website. It's cheeky of her but some of the suggestions might give you a better lifestyle. Also read some ingenious suggestions in the comments from Whicky Whudler.